Just a minor thing, but while I can comment out CSS using CTRL+/ from the Advanced Settings, I cannot do so (using the shortcut) while I'm in the app itself (i.e. "Custom CSS" section).
To be clear, I am referring to the following screen below. I would expect to be able to use CTRL + / to comment styles, but this doesn't work.
Interestingly enough, it does seem to work as expected in the "Preloaded JS".