[GREENFOOT-465] Cheat sheet doesn't update when deleting entire canvas content
Create a frame (e.g. a method frame), then add some content (e.g. some blanks). Select all of the content, from the bottom, so that you end up with a cursor at the top. The cheat sheet shows shortcuts for surrounding the selection. Press delete. The content is removed, but the cheat sheet will shows the shortcuts for surrounding the selection.
- Issue type: Bug
- Priority: Low
- Fix versions: 3.0.1