clean up a stale manual test

Dependencies

• [2] DTBFNHJD manual tests for the protocol with the driver
• [3] M6S4MJKY bugfix: wasn't recovering from errors
• [4] 3GC3WIB6 bugfix: recover from error on new command
• [*] BJ5X5O4A let's prevent the text cursor from ever getting on a drawing

Change contents

• replacement in Manual_tests.md at line 56
  [2.1098]→[2.1098:1242](∅→∅)
  − Quit the client app. The invalid code is saved in file 0002-on.draw in the

  − save dir. However, the file 'head' in the save dir contains '1'.
  [2.1098]

  [2.1242]
  + Quit the client app.