[GREENFOOT-538] Accessibility mode popup should only be shown when "next error" clicked
Accessibility mode (enabled via preferences) causes a popup dialog ("compilation successful") whenever compilation occurs. With Greenfoot 3 having auto-compile, this is now very intrusive - needs to be re-thought.
- "next error" always be enabled when accessibility mode is enabled
- "next error" in accessibility mode shows a dialog (including possibly "compilation successful") rather than the current in-line error display, unless that can be read by a screen reader
- Issue type: Bug
- Priority: Medium
- Fix versions: 3.1.0