correct a mis-named threshold

Dependencies

• [2] UHB4GARJ left/right margin -> left/right coordinates
• [3] 7JH2ZT3F add state arg to Drawing.draw
• [4] LF7BWEG4 group all editor globals
• [5] 4KC7I3E2 make colors easier to edit
• [6] BLWAYPKV extract a module
• [7] VHQCNMAR several more modules
• [8] R3JZDBI2 drop heavyweight near check on file load/store
• [9] LAW2O3NW extract variable Margin_left
• [*] 2L5MEZV3 experiment: new edit namespace

Change contents

• edit in edit.lua at line 16
  [2.22248]

  [2.22248]
  +

  + Same_point_distance = 4 -- pixel distance at which two points are considered the same
• replacement in drawing.lua at line 44
  [3.1159]→[2.37086:37185](∅→∅)
  − love.graphics.circle('line', Drawing.pixels(p.x)+State.left,Drawing.pixels(p.y)+line.y, 4)
  [3.1159]

  [3.1335]
  + love.graphics.circle('line', Drawing.pixels(p.x)+State.left,Drawing.pixels(p.y)+line.y, Same_point_distance)
• replacement in drawing.lua at line 709
  [3.23060]→[2.39398:39461](∅→∅)
  − return (cx-px)*(cx-px) + (cy-py)*(cy-py) < Editor_state.left
  [3.23060]

  [3.23108]
  + return (cx-px)*(cx-px) + (cy-py)*(cy-py) < Same_point_distance*Same_point_distance