delete flags that have never been exercised

Dependencies

• [2] EJOZAD7N typo
• [3] UUTUPEOJ extract a function
• [4] KKMFQDR4 editing source code from within the app
• [5] 5RDWSYK2 consistently use App names for methods everywhere
• [6] JMUD7T3O get rid of ugly side-effects in tests
• [7] 4J4TX7IS get typed in keystrokes to show on screen on iPad

Change contents

• edit in source.lua at line 159
  [3.365]→[3.365:485](∅→∅)
  − App.screen.flags.minwidth = math.min(Display_width, 200)

  − App.screen.flags.minheight = math.min(Display_height, 200)
• edit in source.lua at line 199
  [4.170769]→[4.170769:170831](∅→∅),[4.170831]→[2.12:76](∅→∅)
  − App.screen.flags.minwidth = math.min(App.screen.width, 200)

  − App.screen.flags.minheight = math.min(App.screen.height, 200)
• edit in run.lua at line 62
  [4.179734]→[4.179734:179796](∅→∅),[4.179796]→[2.81:145](∅→∅)
  − App.screen.flags.minwidth = math.min(App.screen.width, 200)

  − App.screen.flags.minheight = math.min(App.screen.height, 200)
• edit in run.lua at line 106
  [4.181148]→[4.181148:181210](∅→∅),[4.181210]→[2.146:210](∅→∅)
  − App.screen.flags.minwidth = math.min(App.screen.width, 200)

  − App.screen.flags.minheight = math.min(App.screen.height, 200)