Merge branch 'master' of https://github.com/prati0100/git-gui

* 'master' of https://github.com/prati0100/git-gui: git-gui: add hotkey to toggle "Amend Last Commit" git-gui: add horizontal scrollbar to commit buffer git-gui: convert new/amend commit radiobutton to checkbutton git-gui: add hotkeys to set widget focus git-gui: allow undoing last revert git-gui: return early when patch fails to apply git-gui: allow reverting selected hunk git-gui: allow reverting selected lines