[gitg] (8 commits) Non-fast-forward update to branch wip/submodules

[Jesse van den Kieboom <jessevdk src gnome org>]

The branch 'wip/submodules' 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:

  abb90c7... Install glade catalog in prefix
  11bebf3... Update glade catalog
  fc46f38... Add open_new to GitgExt.Application
  737d5cc... Implement enumeration of submodules in commit view
  0618918... Add basic history view for staged/unstaged submodules

Commits added to the branch:

  dd45e35... Show the correct header bars buttons depending on the state (*)
  5023d33... Make sure to unbind from settings when closing preferences (*)
  a7d7a52... Install glade catalog in prefix
  b8dd95d... Update glade catalog
  dc15e86... Add open_new to GitgExt.Application
  0c3b69c... Implement enumeration of submodules in commit view
  d395b8d... Add basic history view for staged/unstaged submodules
  92a13b1... Bind orientation preference to submodule diff

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