#276251 by gordon: sidebars created in flexible layouts were assigning css classes too freely, resulting in css cascade problems with embedded flexible mini-panels.

There were some instances where object pass-by-ref differences between php4 and 5 were causing inconsistency; these have been fixed. The logic has also been cleaned up so as to emit fewer errors (due primarily to calling undefined array indices) in the course of normal operation.

Removed explicit module name declarations from layout plugin definition arrays; also brought sub-arrays in those definitions into line with drupal coding standards for arrays.

Updates in the way that the panels API processes plugins obviated the need for explicitly declaring the module name in a plugin, so explicit declarations were removed.

Critical fix to plugin handling: client modules adding certain plugin types via the panels_include_directory() method were only half functioning.

Due to a foolish way of handling the module name in the first-round implementation of panels_include_directory(), module name information was not being properly recorded in plugins that needed it (layout plugins, esp.). The method of handling module name strings has been changed to resolve this problem.

Fixed small access error, wherein check_markup() was being called for pane preview rendering without the access check turned on.

Init import of custom_php.inc, which allows users to access panels context data in custom php panes.

content_types callback was missing the 'path' property to where the icon resided, but for some reason, the icon was working anyway. Added the property so that the plugin is compliant with the API, such that it'll continue to work whenever we iron out what's letting it skip 'path'.

Hopefully this patch will put an end to a painful series of bugs & unexpected behaviors related to panels_page titling.

For dww: Allow scrolling when a pane is dragged outside the frame to deal with very large display setups

#260278 by Pancho, sdboyer: Refactored save routines to be more consistent across the various client modules.

#230819: Made panels_views aware of changes to view system names; getting out of sync was causing errors, or even WSODs.

#275835 by smk-ka: Added widget to views panes configuration allowing the text of the 'more' link to be customized per view pane.

#216194 by sdboyer, sun: Added UI widget for configuring the category in which a mini-panel appears on the 'Add Content' modal form.

#274530 by yoroy, sdboyer: Changed legacy views icons in add content modal so they are immediately differentiable from view panes.

Superimposed 'L' onto the lower-right corner of each icon. We'll likely need to change this in the future when we refactor some of the naming schema, but it's quite adequate for now.

#277958 by sun: Fixed possible php error due to simultaneous uninstalling of panels and panels_mini.

#280419 by sdboyer: Allowed custom content type panes to have their content rendered in the display editor dynamic preview.

Added an editor render callback property that outputs the custom pane's contents, UNLESS it's using a php filter, in which case its outputted through the default filter. See the issue # for rationale.

The editor render callback property allows a content type to define the way it should be rendered in the display editor itself. This is useful if there are circumstances in which you really _do_ need to have the content preview displayed (which, as of beta4, is disabled).

#270770 by dww: Moved queries from panels.module's update 5215 into panels_mini to avoid errors on sites where panels_mini is not installed.

Also added instructional text to calm people in the (very likely) event that they update and receive an error message.