experiment: only show drawing borders when they can be edited

Dependencies

• [2] ZD63LJ2T bugfix: keep the click to create a new drawing from creating a new shape in the drawing
• [3] XX7G2FFJ intermingle freehand line drawings with text
• [4] K6HMLFLZ color close to drawing
• [5] JVRL5TWL store device-independent coordinates inside drawings
• [*] OTIBCAUJ love2d scaffold

Change contents

• replacement in main.lua at line 91
  [3.426]→[3.3:48](∅→∅),[3.48]→[2.3:77](∅→∅)
  − love.graphics.setColor(0.75,0.75,0.75)

  − love.graphics.rectangle('line', 16,line.y, drawingw,pixels(line.h))
  [3.426]

  [3.500]
  +

  + local pmx,pmy = love.mouse.getX(), love.mouse.getY()

  + if pmx > 16 and pmx < 16+drawingw and pmy > line.y and pmy < line.y+pixels(line.h) then

  + love.graphics.setColor(0.75,0.75,0.75)

  + love.graphics.rectangle('line', 16,line.y, drawingw,pixels(line.h))

  + end