CKEditor and "Split Summary at Cursor"

The "Split Summary at Cursor" checkbox works alongside the Teaser textarea. However, Core and CKEditor only check whether the Teaser textarea exists, not the checkbox. Somehow, there are cases when the checkbox is seen as being in the wrong state and from that time on, the system adds an extra <--break--> at the beginning of your block of text, even if another break appears somewhere else (it is not tested because it is expected to be split when the checkbox is in a given state.)

To correct the problem, we simply have to remove the teaser textarea from the form. This case is being checked in the system (Core and CKEditor) so it is safe.

See patch for the actual fix.

Thank you.
Alexis Wilke

Reference: #901360: CKEditor adds an extra break to content after edit preventing teaser