[gtk] (14 commits) Non-fast-forward update to branch matthiasc/for-master

[Matthias Clasen <matthiasc src gnome org>]

The branch 'matthiasc/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:

  4df75f1... scrolledwindow: Drop shadow-type
  b71bd33... scrolledwindow: Document the .frame style class
  4d7506c... treeviewcolumn: Stop using a frame
  372e0ec... frame: Drop shadow-type
  e1e384c... viewport: Drop shadow-type
  29a710f... Drop GtkShadowType
  d07dfec... button: Drop relief
  4e2bb39... menubutton: Drop relief
  9217b6c... Drop GtkReliefStyle
  b186612... calendar: Fix focus keynav

Commits added to the branch:

  726a7ac... inspector: Fix a crash (*)
  4a20a3f... widget-factory: Catch errors (*)
  17cb928... modelbutton: Don't show accels without text (*)
  3469a63... widget-factory: Use a model for the complex menu (*)
  fc89227... scrolledwindow: Document the .frame style class
  00e5a7a... scrolledwindow: Drop shadow-type
  e81af9c... treeviewcolumn: Stop using a frame
  205c0c6... frame: Drop shadow-type
  9db0e4c... viewport: Drop shadow-type
  fcd7579... Drop GtkShadowType
  f13bec0... button: Drop relief
  b4b3379... menubutton: Drop relief
  446bcf9... Drop GtkReliefStyle
  eff7d5d... calendar: Fix focus keynav

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