Notification and undo for moving files/folders

[jancborchardt]

Currently you don’t even notice when you move a file/folder with drag&drop.

After every move, there should be a yellow notification up top saying »Moved file-/foldername to foldername« with an undo action to the right.

cc @schiesbn @PVince81 @owncloud/designers

[PVince81]

Are you ok with having the notification without the "undo" button first ? (should be safe and backportable)

Also I'm not happy to have a "undo" operation that uses the logic "keep the state as is and only do it after a delay". I'd rather have an undo operation re-move back the files. That needs more time to implement (and the current code is ugly, not that reusable).

[jancborchardt]

Yeah, having the notification without undo first would be a good start.

And yes, for move of course the move would be carried out and undo would undo it. Using the logic "keep the state as is and only do it after a delay" is only necessary for final actions like Delete (from trash) and Send.

[jancborchardt]

Relates to #119 (undo), hence hopefully 9.1