couple of accidental globals

Dependencies

• [2] GNQC72UX generalize a function
• [3] TGHAJBES use line cache for drawings as well
• [4] ZPUQSPQP extract a few methods
• [5] LF7BWEG4 group all editor globals
• [6] ILOA5BYF separate data structure for each line's cache data
• [7] NHNP76LG swap return values
• [8] Z5HLXU4P add state arg to a few functions
• [9] 2LEXWUW3 get rid of some ridiculous code
• [10] MXA3RZYK deduce left/right from state where possible
• [*] BULPIBEG beginnings of a module for the text editor

Change contents

• replacement in text.lua at line 454
  [3.1956]→[3.451:569](∅→∅)
  − new_screen_line_starting_pos = State.line_cache[State.cursor1.line].screen_line_starting_pos[screen_line_index-1]
  [3.1956]

  [3.5473]
  + local new_screen_line_starting_pos = State.line_cache[State.cursor1.line].screen_line_starting_pos[screen_line_index-1]
• replacement in text.lua at line 494
  [3.208]→[3.570:688](∅→∅),[2.224]→[3.570:688](∅→∅),[3.1605]→[3.570:688](∅→∅)
  − new_screen_line_starting_pos = State.line_cache[State.cursor1.line].screen_line_starting_pos[screen_line_index+1]
  [2.224]

  [3.4192]
  + local new_screen_line_starting_pos = State.line_cache[State.cursor1.line].screen_line_starting_pos[screen_line_index+1]