switch lines to digit shortcuts as well

Dependencies

• [2] IHHNPJ5Q move
• [3] F3OOGMME switch freehand hotkey to eliminate conflict with search
• [4] HOSPP2AN crisp font rendering
• [5] XNFTJHC4 split keyboard handling between Text and Drawing
• [6] WTDKUACN rectangle and square shapes
• [7] W7JMT5V2 rip out most support for polygons
• [8] JFFUF5AL override mouse state lookups in tests
• [9] DDXXXXBR new mode for polygons
• [10] DRFE3B3Z mouse buttons are integers, not strings
• [*] BLWAYPKV extract a module

Change contents

• replacement in drawing.lua at line 342
  [3.5858]→[2.15:64](∅→∅)
  − elseif App.mouse_down(1) and chord == 'l' then
  [3.5858]

  [2.64]
  + elseif App.mouse_down(1) and chord == '2' then
• replacement in drawing.lua at line 353
  [2.669]→[2.669:724](∅→∅)
  − elseif chord == 'C-l' and not App.mouse_down(1) then
  [2.669]

  [2.724]
  + elseif chord == 'C-2' and not App.mouse_down(1) then