Changes with Aloha.Editor 0.24.15

Bugfix RT57711

link plugin: When typing the URL for a link and then pressing Enter,
it creates the link but you must click tow times to open the link
properties. The fix allows the user to click just once.

Bugfix RT57706

core: (Internet Explorer) When using the cursor keys to move the
cursor up and down across blocks (non editable areas) it was possible
to actually place the cursor inside the block. The cursor would be
trapped in this state and using the cursor up/down keys would scroll
the page up and down (with some strange rendering of the cursor).
This has been fixed now to prevent entering non editable areas with
the cursor.