Schema Compare diff is editable

[adsbot[bot]]

The diff view is editable but it shouldn't be. This can be misleading since making changes in the diff editor won't be applied.

[adstestbot[bot]]

Thanks for submitting this issue. Please also check if it is already covered by an existing one, like:

• git diff viewer shows file encoding error (#4198)
• [Feature] Provide SQL Diff for database objects (#843)
• Add reverse color option to text diff editor (#4826)
• Adding Diff view and Split view container as Model View Editor Components (#4831)