Bumping this previously closed request for an option to completely disable the "visual" editor button. Students often mess up their documents by clicking this button, and I would like to have a way to disable it.
Alternatively, or additionally, it would help to warn users before IDE makes changes to a plain text document when switching to the visual editor. Many students don't realize what happened and why things changed/broke.
Disabling the "visual" editor button (or adding a warning before switching) would prevent accidental document changes, especially for students unfamiliar with the IDE. A simple toggle option could save a lot of confusion. +1 for this feature!