I'm trying to set some CSS for a modal component. I would like the modal to have a width of 90% - the default settings are Large and Fullscreen, with nothing in between. The Large is too small and I don't like the Fullscreen.
The component shows this screen when I click "View and edit CSS":
If I try to edit the External Layer, the changes are discarded. Is this the expected behavior? Should this CSS not be editable?
I'm using Vancouver release.
