CSS sent during AJAX via the rednerer add_css needs file_create_url if using ctools generated CSS mechanism or similar.
Issue #1930448: Panel nodes not properly clearing cache after save with IPE, causing data loss if IPE used multiple times in a row.
Removing errant error_log call used for debug.
Issue #1908342: "Remove this pane" text not translatable.
Issue #1912174 by mikeytown2: Panes rendered with block style need a subject to avoid warnings.
Issue #1777264: Save as default not working in Panelizer.
Issue #1803720 by Peacog and Stefan Vaduva: Fix for unsupported operand types when using print mode with panel nodes.
Issue #1613402: Panel nodes improperly handle cache causing repeated use of IPE to fail.
Issue #1836716 by grndlvl: Allow selection of default pipeline for new pages.
Issue #1649046: Fix double form rendering with all Panels form contexts.
