[gtk] (9 commits) Non-fast-forward update to branch wip/baedert/for-master

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/for-master' 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:

  33ce78b... calendar: Remove spinning code
  a333969... calendar: Try to avoid changing size when changing the year
  7327733... calendar: Use widgets for everything
  cefc53a... calendar: Use GDateTime to select days
  5985160... calendar: Return a GDateTime from get_date()

Commits added to the branch:

  a7b6de4... calendar: Remove spinning code
  a4ed67e... calendar: Try to avoid changing size when changing the year
  7287984... calendar: Use widgets for everything
  eaaf805... calendar: Use GDateTime to select days
  dd87a5e... calendar: Return a GDateTime from get_date()
  eecf4d7... box: Move vfunc implementations before class_init
  15b8793... calendar: Keep a GDateTime around
  61a2a50... calendar: Remove month-changed signal
  634b3d1... calendar: Remove an unused enum