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

#844062: Turned the normal drag and drop editor into a renderer plugin, made the IPE part of it. Also some fairly serious code reorganization.

Restore panels_load_include() as there are other modules that use this function and broke without it.

visibility' permission.

for mini-panels that takes the user to edit that mini-panel.

content_type subtype in panels_mini to improve performance with large
numbers of mini panels.

know the mini panel doesn't exist.

Add a new field to allow setting a panel title from one of its panes.

Added allowed layouts to settings form for panel pages, nodes, minis.