* Hotkeys no longer depend on abapGit installation
When this commit is applied hotkeys also work with
the single abapGit report. Limitation is still that users
only can override hotkeys with the installed abapGit repo.
* Fix hotkey display when no user def. hotkeys
* New: Override hotkeys within one file abapGit report
When this commit is applied it's possible to override the default
shortcut also in the one file abapGit report. It's no longer necessary
to installe the full abapGit repo to use this feature
* Extract is_merged + check in hotkey logic
