Fix project root on cygwin-git.

This patch is related to #264. The new code had removed `msysgitPath` in preference.
German translation
Keep scrollPos for every file in commit diff dialog
Merge pull request #271 from yfwz100/patch-2

Fix project root on cygwin-git.
Merge pull request #273 from SAPlayer/german-translation

German translation
Remove leftover line
Autodetect msysgit bash on Windows
Cleanup...
Merge pull request #274 from SAPlayer/commit-diff-keep-scrollpos

Keep scrollPos for every file in commit diff dialog
Changelog...