Fix:

• Block Editor – Background color from content does not work.
• Block Editor – Columns block having incorrect margin when on tablet/mobile devices.
• Removed padding to column element of Gutenberg for responsive devices.
• Menu not correctly centers aligned when no menu is set to the primary location, i.e. wp_page_menu().
• Search is not visible on screen sizes 768px to 920px.
• Background color does not work for Below Header.
• Removed top border for custom menu item on mobile devices.
• LifterLMS – add LifterLMS lesson page builder support (props – @thomasplevy)