panels_display_save().

#745808 by Robbert: use number_format() in flexible width calculations to ensure locale settings cannot bork generated CSS.

approach was old and crusty.

Introduce the Panels stylizer module which builds on the CTools stylizer base to create user definable, recolorable styles.

#683162: Convert all plugins to use new $plugin = array() format. This is less brittle than the specially named hook.

#612704 by c960657: panels_get_pane_content() inappropriately created a blank context when no contexts were available.

#607420: Visibility rules did not appear in the list when added to a pane (though they still applied).

#606980 by Deciphered and sethfreach: Typo caused panel-pane class to disappear if another class was assigned.

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

#568218: Links to clone, export, delete/revert, enable/disable variants from the main summary page were incorrect and led to an operation trail not found message.