title: Can't disappear "untracked" folder in git status
body: <p>I'm new to Git. A couple of days ago I tried to undo a "git add --all" with "git reset" after a quick Google suggested that. Luckily it appears no material harm was inflicted on my working directory, however Git has added a folder of angularjs modules I had listed in .gitignore, and now this folder (and everything in it) is showing up as "untracked" in "git status". It didn't prior to the reset, and nothing else in gitignore is doing this. I've tried a few solutions including "git rm -r --cached node_modules" and this <a href="https://stackoverflow.com/questions/11525358/git-untracked-files-list-is-wrong">Git untracked files list is wrong</a> but it's still there. All suggestions appreciated!</p>