reorganize some comments

Dependencies

• [2] UBA2ZUCP remove a duplicate print to screen
• [3] KKMFQDR4 editing source code from within the app
• [4] KMSL74GA support selections in the source editor
• [5] GZ5WULJV switch source side to new screen-line-based render
• [6] SDEY7LFJ rename a variable

Change contents

• replacement in source_text.lua at line 27
  [3.574]→[3.614:651](∅→∅),[3.614]→[3.614:651](∅→∅)
  − -- render any link decorations
  [3.574]

  [3.651]
  + -- render any highlights
• edit in source_text.lua at line 29
  [3.714]

  [3.714]
  + -- render link decorations
• edit in source_text.lua at line 43
  [3.20777]→[2.234:265](∅→∅)
  − -- render any highlights