Changes with Aloha.Editor 0.26.4

Bugfix RT58344

The image plugin would not accept disabling the “insert image” button by configuration. This has been fixed. Also, a small bug that prevented internal configuration cleanup when destroying an editable was fixed.

Bugfix RT58287

Button sets in a ribbon toolbar where falsely displayed. The list plugin forced a maximum width of 60px for all button sets. This has been repaired.
Now only the button set in the aloha toolbar have a width of 60px.