This is hard to implement. Any alternative suggestions?

Unfortunately, that's not quickly to solve for a combobox.

Of course, this is a valid request, but we have no good idea how to implement it. With SmartGit 18.2 the options might change, too. Good suggestions are appreciated.

For that purpose we use a separate dedicated command: "Modify or Split Commit".

Simply hiding untracked files is no option for you?

For this use-case I'd rather would request to allow to unselect the branch "anchor" from the Commits view.

I reckon, this is not possible with the used GUI toolkit (SWT). And what benefit it would bring?

You could give it a try: https://www.syntevo.com/smartgit/preview. The portable bundle contains Git and the bundled Git contains LFS.

Have you already tried SmartGit 18.2 preview from https://www.syntevo.com/smartgit/preview?