Dialogs not using <form> elements

[hurradieweltgehtunter]

Example: Edit Tags

https://github.com/owncloud/web/blob/2d5f5d6d7ba60eb73f4dd863e55c49766742c3e9/packages/web-app-files/src/components/SideBar/TagsPanel.vue#L3

Instead of having a

element, which captures the submitevent, a divis used. This means that the submit button click needs to be captured manually (button event "confirm").

Relates to https://github.com/owncloud/web/issues/8897 (3rd point)

Also is an a11y issue.

[hurradieweltgehtunter]

Seems are not used anywhere (modals, forms, etc), not only in right sidebar.