Issue #2828513 by albertski, TravisCarden, phenaproxima: User error: "max-age" is an invalid render array key in Drupal\Core\Render\Element::children()
Added Panelizer as a test dependency.
Issue #2808983 by DamienMcKenna: Add tests to Panels
Issue #2785981 by Елин Й.: Undefined variable $page in panels_panel_context_save() function in panel_context.inc
Issue #2329419 by heddn, mglaman: Style permissions not granular enough
Issue #2479879 by temkin, joelpittet, Mixologic: Move 'panels_page_allowed_types' variable to a custom table
Issue #2792651 by dsnopek: Watchdog error when changing layout
Issue #2787637 by dsnopek: Page manager gives access denied when managing newly added variants to tasks other than 'page'
Revert "Issue #2769183: Update use statements."
This reverts commit a0b4e586bf7fe31670f7fbb1448226cdb2e9cd83.
Issue #2781897 by lauriii: Title of empty block is rendered
Issue #2490142 by rteijeiro, sylus: Panels Eslint errors
Issue #2769183: Update use statements.
Issue #2667754 by dsnopek, EclipseGc, japerry, phenaproxima: Allow other modules to disable the IPE based on custom logic
Issue #2758645 by sylus, floretan: Fix PHP notices when changing layout
Issue #2677376 by samuel.mortenson, josebc, Juterpillar, sylus: Apostrophe's are replaced by ' for node titles
Issue #2767009 by samuel.mortenson: "Create content" is displayed unconditionally
Removed non-existent "LayoutPluginUpdate" alias from PanelsDisplayVariant.php.
Issue #2769163 by Nikhilesh Gupta, sylus, samuel.mortenson: @file docblock as per [#2665992], [#2304909]
Issue #2757331 by japerry, EclipseGC, dsnopek: Provide backwards compatibility for editor plugin.
Issue #2636490 by samuel.mortenson: IPE cancel button is easy to mistake for a button to close the tray
Issue #2787241 by dsnopek, cboyden, japerry: IPE buttons do not reappear after changing layout
Issue #2787047 by dsnopek: Pages created via the "Landing page" wizard don't have storage type/id set
Issue #2787103 by dsnopek, cboyden, japerry: IPE with Page Manager permission no longer works
Issue #2785843 by bkosborne, dsnopek, svenb: CSS IDs and classes for panes are potentially rewritten
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