[gtk] (5 commits) Non-fast-forward update to branch nested-popover-menu

[Matthias Clasen <matthiasc src gnome org>]

The branch 'nested-popover-menu' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  818acef... Add nesting popover menus
  25644d8... popover menubar: Use nested popover menus
  e7974f3... Fix up keynav in popover menus
  d756181... Document new api
  d8980be... warning fixes
  e897adc... widget-factory: Add more submenus
  c6aba67... popover: Support vertical aligment
  291eff3... popover menu: Use vertical alignment

Commits added to the branch:

  bc8d2ad... widget-factory: Add more submenus
  c75a368... popover: Support vertical aligment
  ea44ead... Add nesting popover menus
  3cbf184... Add a timeout for open submenus
  1203dc5... popover menubar: Use nested popover menus