This is not a common task for 99% of the Git users.

These 3 rows should indicate a pile of files.

This would be hard to implement because one can select files from different repositories. The light-weight variant https://smartgit.userecho.com/communities/1/topics/301- is implemented now.

Please try with a portable bundle (no previous settings).

You can give it a try in 18.1 preview #12063 (Help | Check for Latest Build).

I have implemented something like that but as some kind of super-filter to the current View options, so you only can see 1 list - either the current "mixed" style, the staged files or the files with local changes (for the current "mixed" style, no "Index" and "Working Tree" toggle buttons at the right will be shown, so it will look as always).

We don't have plans to show 2 lists, because this would require much more work.

Because every kind of window has different shortcuts, we think that having a separate menu item for the customization of the toolbar and shortcuts seems reasonable. BTW, LibreOffice also uses this approach. I only know of single-window applications (e.g. text editors) that have them embedded into the preferences.