[gtk] (7 commits) Non-fast-forward update to branch wip/matthiasc/context-menu

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/context-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:

  c939f2f... gtk-demo: Rewrite the search entry demo
  f3abb2a... widget-factory: Redo the context menu example
  0f79363... cell renderer: remove populate-popup
  2464f89... places sidebar: remove populate-popup
  9d6a072... treeview: Stop disabling the context menu
  2522c7b... link button: Use new context menu api
  3130129... color chooser: Use a popover menu

Commits added to the branch:

  5024aba... gtk-demo: Rewrite the search entry demo
  b5b4efc... widget-factory: Redo the context menu example
  88d04dd... cell renderer: remove populate-popup
  30c3463... places sidebar: remove populate-popup
  1ed854e... treeview: Stop disabling the context menu
  289ff8a... link button: Use new context menu api
  2c75a11... color chooser: Use a popover menu