So basically you want a GUI version of this? https://stackoverflow.com/questions/12481639/remove-files-from-git-commit

No, because it does not allow me to actually commit any new files because I cannot see them (outside of the temp directory of course). Hiding allows me to avoid the clutter at the expense of potentially missing files I meant to add. What I had in mind would achieve both results (hiding directories quickly, but not missing untracked files).

Another alternative to this request would be to improve the ignore dialog. Currently I can ignore single files or custom patterns (the default being the file extension). It would be helpful to have a third option to ignore a file's directory completely. That would do for me, although I would prefer the variant outlined above.

You think I should add a new ticket for the alternative?