[gtk+] (3 commits) Non-fast-forward update to branch wip/dboles/combobox-cleanup

[Daniel Boles <dboles src gnome org>]

The branch 'wip/dboles/combobox-cleanup' 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:

  cfae7cb... combobox: Remove property cell-area
  e1c92b0... combobox: Move area and menu to .ui file
  89c825e... combobox: Stop pointlessly NULL-checking the menu
  2f67488... combobox: Remove popup_for_device()

Commits added to the branch:

  6ae07a0... combobox: Remove property cell-area
  614334b... combobox: Move area and menu to .ui file
  a37954a... combobox: Stop pointlessly NULL-checking the menu