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

* 'master' of https://github.com/prati0100/git-gui: git-gui: create a new namespace for chord script evaluation git-gui: reduce Tcl version requirement from 8.6 to 8.5 git-gui--askpass: coerce answers to UTF-8 on Windows git-gui: fix error popup when doing blame -> "Show History Context" git-gui: add missing close bracket git-gui: update German translation git-gui: extend translation glossary template with more terms git-gui: update pot template and German translation to current source code