Merge git://git.kernel.org/pub/scm/gitk/gitk

* git://git.kernel.org/pub/scm/gitk/gitk: gitk: Fix selection of tags gitk: Default to the system colours on Windows gitk: Update Japanese translation gitk: Fix "git gui blame" invocation when called from top-level directory gitk: Disable checkout of remote branches gitk: Improve appearance of radiobuttons and checkbuttons gitk: Skip translation of "wrong Tcl version" message gitk: Add Japanese translation gitk: Use the --submodule option for displaying diffs when available gitk: Fix diffing committed -> staged (typo in diffcmd) gitk: Add configuration for UI colour scheme gitk: Don't compare fake children when comparing commits gitk: Show diff of commits at end of compare-commits output gitk: Add a user preference to enable/disable use of themed widgets gitk: Fix errors in the theme patch gitk: Use themed tk widgets gitk: Restore scrolling position of diff pane on back/forward in history