one missing transition between shape modes

Dependencies

• [2] XNFTJHC4 split keyboard handling between Text and Drawing
• [3] WTDKUACN rectangle and square shapes
• [*] BLWAYPKV extract a module

Change contents

• edit in drawing.lua at line 352
  [2.6467]

  [2.6467]
  + elseif drawing.pending.mode == 'square' or drawing.pending.mode == 'rectangle' then

  + -- reuse existing vertices
• replacement in drawing.lua at line 421
  [2.8641]→[2.8641:8691](∅→∅)
  − elseif drawing.pending.mode == 'polygon' then
  [2.8641]

  [2.8691]
  + elseif drawing.pending.mode == 'polygon' or drawing.pending.mode == 'rectangle' or drawing.pending.mode == 'square' then