Issue #2220271 by ndobromirov: Add pre-render hooks before rendering all panes and regions
Issue #2259957 by michaelmol: Let other modules filter the available layouts in panels_ipe
Issue #2441097 by hctom: panels_mini_uninstall() fails when block module is not installed
Issue #1588212 by axel.rutz, stevector: Add "optional" checkbox to require contexts within mini panels
Back to dev (3.6)
Issue #2011814 by jerrylow, das-peter, joelpittet: Add a JS quick filter to the add content modal dialog
Issue #2390803 by dsnopek, cboyden: Keyboard focus should be on the first element in the selected category tab in the "Add content" model (accessibility problem)
Issue #2448825 by dsnopek: Wrong indentation in Panels exports
Issue #2471575 by LKS90: Replace all occurrences of String class with the SafeMarkup equivalent
Issue #2419407 by dsnopek: Update for Drupal 8.0.0-beta6 and recent page_manager/layout_plugin changes
Issue #2149025 by drupalshrek, tripper54, jacob.embree: Refer to Title type dropdown to help users get No Title
Issue #2288747 by dobe, mrjmd: Panels Title Headings
Issue #2056701 by DamienMcKenna, B-Prod, Peacog: Panels layout renderer should not rely on "path to theme", which may be wrong
Issue #2366389 by das-peter: Send context to ctools_admin_title to suppress missing context error.
Issue #2188787 by DamienMcKenna, axel.rutz, juanjo_dv: Custom body classes not working for site template variant
Issue #2408729 by japerry, DamienMcKenna: Hardcode the last released Panels version in the info file
Issue #2366389 by mglaman, heddn: Undefined index: title in panels_renderer_editor->ajax_style_type() (line 946
Issue #1775234 by DamienMcKenna: Local tasks on MiniPanels edit pages are confusing
Issue #2323861 by pfrenssen: Allow to set pane attributes from within the content type
Issue #1627698 by DamienMcKenna, ergophobe: After cloning page variant: "Undefined index: body_classes_to_remove in panels_panel_context_edit_settings()"
Issue #2057897 by undertext: Display pane's admin title on pane when customizing the page with IPE
'Issue #2029297 by coleman.sean.c: Margins not applied in 25/50/25 stacked layout'
Issue #2021155 by das-peter: Show administrative title of a pane on hover
Issue #2381319 by gmclelland, Michelle: Refactor "Edit block" and add "Edit menu links" items in pane dropdown links
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