[gtk+] (9 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:

  031f398... combobox: Drop a workaround from the list mode age
  6055184... combobox: popdown() the menu during unmap()
  2573ba3... combobox: Stop incessantly NULL-checking the menu
  b9380fb... combobox: Factor repeated code out to function
  187ac1c... combobox: Remove popup_for_device()

Commits added to the branch:

  f31aad3... Visual Studio builds: Update GSK project (*)
  3629def... gtkmain: Fix build on Windows (*)
  95e0b49... update zh_CN translation (*)
  f686dfb... Revert "wayland: Push NULL buffer when hiding a GdkWindow" (*)
  360fbd0... combobox: popdown() the menu during unmap() (*)
  208d837... combobox: Drop a workaround from the list mode age
  6138076... combobox: Stop incessantly NULL-checking the menu
  65d0035... combobox: Factor repeated code out to function
  5c9d4d5... combobox: Remove popup_for_device()

(*) This commit already existed in another branch; no separate mail sent