bugfix: naming points in drawings

Dependencies

• [2] IFTYOERM line.y -> line_cache.starty in a few more places
• [3] 2L5MEZV3 experiment: new edit namespace
• [4] LNUHQOGH start passing in Editor_state explicitly
• [*] 3MAZEQK5 add state arg to Text.textinput
• [*] APYPFFS3 call edit rather than App callbacks in tests

Change contents

• edit in edit.lua at line 281
  [3.6311]→[2.638:743](∅→∅)
  − for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end -- just in case we scroll
• edit in edit.lua at line 292
  [3.10292]

  [6.777]
  + for _,line_cache in ipairs(State.line_cache) do line_cache.starty = nil end -- just in case we scroll
• edit in edit.lua at line 493
  [7.6430]

  [7.6430]
  + edit.update(State, 0)
• edit in edit.lua at line 502
  [7.6627]

  [7.6627]
  + edit.update(State, 0)
• edit in edit.lua at line 512
  [7.6891]

  [7.6891]
  + edit.update(State, 0)
• edit in edit.lua at line 520
  [7.7075]

  [7.7075]
  + edit.update(State, 0)
• edit in edit.lua at line 528
  [7.7264]

  [7.7264]
  + edit.update(State, 0)