switch one call back to keychord_pressed

Dependencies

• [2] RZKXJYFK switch a bunch of tests to textinput events
• [3] APYPFFS3 call edit rather than App callbacks in tests
• [4] TGZAJUEF bring back a set of constants
• [5] CRYGI3LR more drawing tests
• [*] K2X6G75Z start writing some tests for drawings

Change contents

• replacement in drawing_tests.lua at line 165
  [3.2165]→[2.27:73](∅→∅)
  − edit.run_after_textinput(Editor_state, 'o')
  [3.2165]

  [3.3878]
  + edit.run_after_keychord(Editor_state, 'o')