resource editor module

[mgh]

Based on jsio-staging branch

To use, visit: http://localhost:9200/apps/[route-id]/modules/resource-editor/extension/ui/ (requires building with devkit-plugin-builder)

Features

• [x] show resources/ folders and files from http-fs mount
• [x] enable uploading files by drag-drop to file tree
• [x] enable uploading files by drag-drop to folder view
• [x] upload confirm dialog (show list of files to-be-uploaded with previews, remove files you don't want)
• [x] delete file
• [ ] move/copy file: drag and drop to file tree, dialog prompt: [copy or move?]
• [x] file preview thumbnail for sounds (click to play/pause sound)
• [ ] file preview thumbnail for animations (parse filenames like timestep into animations, show single animated preview for each animation)
• [ ] undo/redo
• [x] html5 history for paths, hyperlinks in breadcrumb
• [ ] persist expanded/collapsed folders in localStorage

  Possible Future Features

• multiple file select
• batch-download as a zip (consider https://stuk.github.io/jszip/)
• community art gallery for downloading files into your project
• basic image editor: crop, rotate, resize, split