clean up some absolute coordinates

Dependencies

• [2] PP2IIHL6 stop putting button state in a global
• [3] UN7GKYV5 support hyperlinks in the source editor
• [4] VHQCNMAR several more modules
• [5] 4KC7I3E2 make colors easier to edit
• [6] WJBZZQE4 fold together two largely similar cases
• [7] BW2IUB3K keep all text cache writes inside text.lua
• [8] 6J3NXBYG affordance to adjust width for word wrap
• [*] 2L5MEZV3 experiment: new edit namespace

Change contents

• replacement in icons.lua at line 7
  [4.5454]→[4.5454:5526](∅→∅)
  − love.graphics.line(4,y+6, 16,y+6)

  − love.graphics.line(10,y, 10,y+12)
  [4.5454]

  [3.1318]
  + love.graphics.line(x,y+6, x+12,y+6)

  + love.graphics.line(x+6,y, x+6,y+12)
• replacement in edit.lua at line 171
  [4.269]→[2.45:113](∅→∅)
  − button(State, 'draw', {x=4,y=y+4, w=12,h=12, color={1,1,0},
  [4.269]

  [4.330]
  + button(State, 'draw', {x=State.left-Margin_left+4, y=y+4, w=12,h=12, color={1,1,0},