bugfix: wasn't recovering from errors

Dependencies

• [2] DTBFNHJD manual tests for the protocol with the driver
• [3] T7QIIGQ6 attempt at better error recovery
• [4] RT6EV6OP delegate update events to drawings
• [5] K464QQR4 more defensive resize handling
• [6] 2L5MEZV3 experiment: new edit namespace
• [7] OTIBCAUJ love2d scaffold
• [8] J2SVGR2E experiment: blinking cursor
• [9] JOPVPUSA editing source code from within the app
• [10] LNUHQOGH start passing in Editor_state explicitly
• [11] KKMFQDR4 editing source code from within the app
• [12] AVTNUQYR basic test-enabled framework
• [13] APX2PY6G stop tracking wallclock time
• [14] 5XQ4Y7NU reorg manual tests doc
• [15] 3QQZ7W4E bring couple more globals back to the app level
• [16] PJ5PQAQE record support for multiple versions
• [17] KVHUFUFV reorg
• [*] BJ5X5O4A let's prevent the text cursor from ever getting on a drawing

Change contents

• edit in main.lua at line 156
  [4.1398]→[3.756:793](∅→∅)
  − if Mode == 'error' then return end
• replacement in Manual_tests.md at line 66
  [2.1656]→[2.1656:1834](∅→∅)
  − 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'.

  − [Don't restart the client app.]
  [2.1656]

  [2.1834]
  + Quit the client app.