missing shape modes in a couple more places

Dependencies

• [2] VHQCNMAR several more modules
• [3] 3RGHOJ25 DRY some code
• [4] VFJEVPPO bugfix: function names
• [*] BLWAYPKV extract a module

Change contents

• replacement in drawing.lua at line 652
  [2.21152]→[2.21152:21190](∅→∅)
  − elseif shape.mode == 'polygon' then
  [2.21152]

  [2.21190]
  + elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then