Merge git://repo.or.cz/git-gui

Merge git://repo.or.cz/git-gui

* git://repo.or.cz/git-gui:
  git-gui: update french translation
  git-gui: update Japanese translation
  git-gui: fix shortcut for menu "Commit/Revert Changes"
  git-gui: Quote git path when starting another gui in a submodule
  git-gui: update Italian translation
  git-gui: Update Swedish translation (520t0f0u)
  git-gui: use themed tk widgets with Tk 8.5
  git-gui: Update German translation (12 new or changed strings).
  git-gui: Update translation template
  git-gui: Remove unused icon file_parttick
  git-gui: use different icon for new and modified files in the index
  git-gui: set GIT_DIR and GIT_WORK_TREE after setup
  git-gui: update shortcut tools to use _gitworktree
  git-gui: handle bare repos correctly
  git-gui: handle non-standard worktree locations
  git-gui: Support applying a range of changes at once
  git-gui: Add a special diff popup menu for submodules
  git-gui: Use git diff --submodule when available