#879482 by mvc: Ensure Panels and CTools module files are loaded during update. Apparently could cause WSOD if not.

#893456 by omerida: Change FAPI definition of panel node "body" field to be more consistent with other node body fields.

#869766 by rupl: flexible layout builder could fail with multiple columns in only one row. (Needs clear cache to see changes in generated CSS.)

#861426: Editing a mini panel while that same mini panel is displayed on the page resulted in a crash.

In Flexible, the "class" would not stick when adding a new region/row/column but would when editing.