Merge https://github.com/prati0100/git-gui

Merge https://github.com/prati0100/git-gui

* https://github.com/prati0100/git-gui:
  git-gui: use gray background for inactive text widgets
  git-gui: Fix selected text colors
  Makefile: conditionally include GIT-VERSION-FILE
  git-gui: fix colored label backgrounds when using themed widgets
  git-gui: ssh-askpass: add a checkbox to show the input text
  git-gui: update Russian translation
  git-gui: use commit message template
  git-gui: Only touch GITGUI_MSG when needed