Changes with Aloha.Editor 1.3.19

Bugfix SUP-1417

When a plugin using the repository browser was used, navigating with CTRL-LEFT (jumping wordwise to the left)
did not work. This was because the repository browser would use CTRL-LEFT to close/open the tree pane.
Handling of hotkeys for the tree pane has been disabled now, so that CTRL-LEFT will now work in editables.

Bugfix SUP-1607

Drag and drop of aloha-block elements did not work in nested editables and
table cells. This has been fixed.

Bugfix SUP-2101

Using the content rules whitelist functionality would hide the removeFormat
button from the format-plugin. This has been fixed, and removeFormat ignores
the content rules (which also means that it cannot be blacklisted).