I have dynamic workspaces enabled in Tweaks because I occasionally like to switch between windows quickly without having to use the "switch application" shortcut. I like to use a transparent terminal with just my desktop wallpaper in the background, but if I'm using my browser or any window with text displayed it doesn't make sense to open up a transparent terminal window on top of that. So I separate windows into dynamically created workspaces. The only problem is, they aren't automatically removed when they become empty and I don't see any shortcuts/settings in Tweaks to manually remove the empty workspaces. In fact, there's always two workspaces open by default for some reason, and if I have open additional workspaces I can only bring it back down to two if I close every app I have open. Any ideas?
For reference:
Ubuntu 18.04.1 LTS
GNOME Shell 3.28.3
GTK+ 3.22.30