update wagtail - do sth. about richtext editor

[fuzzylogic2000]

With wagtail 3, the Hallo.js richtext editor is removed.

Update wagtail from 2.16.2 to 3.0.

Changelog

### 3.0 ``` ~~~~~~~~~~~~~~~~ * Phase out special-purpose panel types (`StreamFieldPanel`, `RichTextFieldPanel`, `ImageChooserPanel`, `DocumentChooserPanel`, `PageChooserPanel`, `SnippetChooserPanel`) in favour of `FieldPanel` (Matt Westcott) * Implement splitting of rich text blocks within StreamField (Jacob Topp-Mugglestone) * Add support for image rendition prefetching (Andy Babic) * Upgrade ESLint and Stylelint configurations to latest shared Wagtail configs (Thibaud Colas, Paarth Agarwal) * Major updates to frontend tooling; move Node tooling from Gulp to Webpack, upgrade to Node v16 and npm v8, eslint v8, stylelint v14 and others (Thibaud Colas) * Change comment headers’ date formatting to use browser APIs instead of requiring a library (LB (Ben Johnston)) * Lint with flake8-comprehensions and flake8-assertive, including adding a pre-commit hook for these (Mads Jensen, Dan Braghis) * Switch the Wagtail branding font to a system font stack (Steven Steinwand, Paarth Agarwal) * Add black configuration and reformat code using it (Dan Braghis) * Remove UI code for legacy browser support: polyfills, IE11 workarounds, Modernizr (Thibaud Colas) * Remove redirect auto-creation recipe from documentation as this feature is now supported in Wagtail core (Andy Babic) * Remove IE11 warnings (Gianluca De Cola) * Remove the legacy Hallo rich text editor as it has moved to an external package (LB (Ben Johnston)) * Increase the size of checkboxes throughout the UI, and simplify their alignment (Steven Steinwand) * Adopt [MyST](https://myst-parser.readthedocs.io/en/latest/) for parsing documentation written in Markdown, replaces recommonmark (LB (Ben Johnston), Thibaud Colas) * Installing docs extras requirements in CircleCI so issues with the docs requirements are picked up earlier (Thibaud Colas) * Remove core usage of jinjalint and migrate to curlylint to resolve dependency incompatibility issues (Thibaud Colas) * Switch focus outlines implementation to `:focus-visible` for cross-browser consistency (Paarth Agarwal) * Remove most uppercased text styles from admin UI (Paarth Agarwal) * Convert all UI code to CSS logical properties for Right-to-Left (RTL) language support (Thibaud Colas) * Migrate multiple documentation pages from RST to MD - including the editor's guide (Vibhakar Solanki, LB (Ben Johnston), Shwet Khatri) * Add documentation for defining custom form validation on models used in Wagtail's `modelAdmin` (Serafeim Papastefanos) * Update `README.md` logo to work for GitHub dark mode (Paarth Agarwal) * Avoid an unnecessary page reload when pressing enter within the header search bar (Images, Pages, Documents) (Riley de Mestre) * Removed unofficial length parameter on `If-Modified-Since` header in `sendfile_streaming_backend` which was only used by IE (Mariusz Felisiak) * Add Pinterest support to the list of default oEmbed providers (Dharmik Gangani) * Update Jinja2 template support for Jinja2 3.x (Seb Brown) * Add ability for `StreamField` to use `JSONField` to store data, rather than `TextField` (Sage Abdullah) * Replace `content_json` `TextField` with `content` `JSONField` in `PageRevision` (Sage Abdullah) * Remove `replace_text` management command (Sage Abdullah) * Replace `data_json` `TextField` with `data` `JSONField` in `BaseLogEntry` (Sage Abdullah) * Split up linting / formatting tasks in Makefile into client and server components (Hitansh Shah) * Add support for embedding Instagram reels (Luis Nell) * Use Django’s JavaScript catalog feature to manage translatable strings in JavaScript (Karl Hobley) * Add a `page_description` to the Page model, to provide help text for a given page type (Kalob Taulien, Thibaud Colas, Matt Westcott, Stefan Hammer) * Add `trimmed` attribute to all blocktrans tags, so spacing is more reliable in translated strings (Harris Lapiroff) * Add documentation that describes how to use `ModelAdmin` to manage `Tag`s (Abdulmajeed Isa) * Rename the setting `BASE_URL` (undocumented) to `WAGTAILADMIN_BASE_URL` and add to documentation, `BASE_URL` will be removed in a future release (Sandil Ranasinghe) * Validate to and from email addresses within form builder pages when using `AbstractEmailForm` (Jake Howard) * Add `WAGTAILIMAGES_RENDITION_STORAGE` setting to allow an alternative image rendition storage (Heather White) * Add `wagtail_update_image_renditions` management command to regenerate image renditions or purge all existing renditions (Hitansh Shah, Onno Timmerman, Damian Moore) * Fully remove the legacy sidebar, with slim sidebar replacing it for all users (Thibaud Colas) * Add support for adding custom attributes for link menu items in the slim sidebar (Thibaud Colas) * Implement new slim page editor header with breadcrumb (Steven Steinwand, Karl Hobley) * Add the ability for choices to be separated by new lines instead of just commas within the form builder, commas will still be supported if used (Abdulmajeed Isa) * Add internationalisation UI to modeladmin (Andrés Martano) * Support chunking in `PageQuerySet.specific()` to reduce memory consumption (Andy Babic) * Implement new tabs design across the admin interface (Steven Steinwand) * Move page meta information from the header to a new status side panel component inside of the page editing UI (Steven Steinwand, Karl Hobley) * Add useful help text to Tag fields to advise what content is allowed inside tags, including when `TAG_SPACES_ALLOWED` is `True` or `False` (Abdulmajeed Isa) * Change `AbstractFormSubmission`'s `form_data` to use JSONField to store form submissions (Jake Howard) * Add image duplicate detection on upload (Tidiane Dia, with sponsorship from The Motley Fool) * Add a system font stack for monospace fonts (Rishank Kanaparti) * Fix: When using `simple_translations` ensure that the user is redirected to the page edit view when submitting for a single locale (Mitchel Cabuloy) * Fix: When previewing unsaved changes to `Form` pages, ensure that all added fields are correctly shown in the preview (Joshua Munn) * Fix: When Documents (e.g. PDFs) have been configured to be served inline via `WAGTAILDOCS_CONTENT_TYPES` & `WAGTAILDOCS_INLINE_CONTENT_TYPES` ensure that the filename is correctly set in the `Content-Disposition` header so that saving the files will use the correct filename (John-Scott Atlakson) * Fix: Improve the contrast of the “Remember me” checkbox against the login page’s background (Steven Steinwand) * Fix: Group permission rows with custom permissions no longer have extra padding (Steven Steinwand) * Fix: Make sure the focus outline of checkboxes is fully around the outer border (Steven Steinwand) * Fix: Consistently set `aria-haspopup="menu"` for all sidebar menu items that have sub-menus (LB (Ben Johnston)) * Fix: Make sure `aria-expanded` is always explicitly set as a string in sidebar (LB (Ben Johnston)) * Fix: Use a button element instead of a link for page explorer menu item, for the correct semantics and behavior (LB (Ben Johnston)) * Fix: Make sure the “Title” column label can be translated in the page chooser and page move UI (Stephanie Cheng Smith) * Fix: Remove redundant `role="main"` attributes on `<main>` elements causing HTML validation issues (Luis Espinoza) * Fix: Allow bulk publishing of pages without revisions (Andy Chosak) * Fix: Stop skipping heading levels in Wagtail welcome page (Jesse Menn) * Fix: Add missing `lang` attributes to `<html>` elements (James Ray) * Fix: Avoid 503 server error when entering tags over 100chars and instead show a user facing validation error (Vu Pham, Khanh Hoang) * Fix: Ensure `thumb_col_header_text` is correctly used by `ThumbnailMixin` within `ModelAdmin` as the column header label (Kyle J. Roux) * Fix: Page copy in Wagtail admin ignores `exclude_fields_in_copy` (John-Scott Atlakson) * Fix: Translation key `IntegrityError` when publishing pages with translatable `Orderable`s that were copied without being published (Kalob Taulien, Dan Braghis) * Fix: Ignore `GenericRelation` when copying pages (John-Scott Atlakson) * Fix: Implement ARIA tabs markup and keyboards interactions for admin tabs (Steven Steinwand) * Fix: Ensure `wagtail updatemodulepaths` works when system locale is not UTF-8 (Matt Westcott) * Fix: Re-establish focus trap for Pages explorer in slim sidebar (Thibaud Colas) * Fix: Ensure the icon font loads correctly when `STATIC_URL` is not `"/static/"` (Jacob Topp-Mugglestone) ```

Links

- PyPI: https://pypi.org/project/wagtail - Changelog: https://pyup.io/changelogs/wagtail/ - Homepage: https://wagtail.org/

[goapunk]

the hallo.js rich-text editor has been moved to a separate package: https://github.com/bergie/hallo

[fuzzylogic2000]

Na, we don't want to use that one: the last commit was 2018. And wagtail themselves say to not use it anymore: https://github.com/wagtail/wagtail-hallo I don't know if we should still try to find a package for that that is maintained or should try to replace it after all.

[goapunk]

wagtail recommends draftail as richt-text editor, so I guess we could take a look at that