Changes with Aloha.Editor 1.3.15

Bugfix SUP-1775

The tooltip of menu buttons did not disappear when the corresponding
drop down menu was opened and part of the menu was concealed. Also
sometimes when open drop down menu would not close, when another
menu button was clicked. These issues have been fixed.

Bugfix SUP-1705

The remove formatting action of the format plugin would remove
elements which were aloha-blocks. Also removing the formatting from a list
could sometimes remove list items or insert superfluous paragraphs. These
issues have been fixed.