Removed diff and code view from the AutoForm richText inputs

[MillanWangGadget]

BEFORE

NOW

• UPDATE
  • Antoine noticed that there were a lot of bugs and usability issues with the code and diff views in the AutoForm rich text input.
  • This PR removes them since they are rarely used and provide a bad experience
    • Pain points
      • The diff view doesn't really make sense. You can edit the old and new, and the state resets if you change to the regular view and back
      • The code view is not usable. Every single keystroke blurs the input.