bugfix: alt-tab shouldn't emit keypress events

Dependencies

• [2] SDRXK4X5 move
• [3] 3QQZ7W4E bring couple more globals back to the app level
• [4] 2L5MEZV3 experiment: new edit namespace
• [*] OTIBCAUJ love2d scaffold
• [*] BYG5CEMV support for naming points
• [*] AVTNUQYR basic test-enabled framework
• [*] CIQN2MDE bugfix: typing a capital letter deletes selection

Change contents

• replacement in main.lua at line 22
  [2.9]→[2.9:29](∅→∅)
  − -- for hysteresis
  [2.9]

  [2.29]
  + -- for hysteresis in a few places
• edit in main.lua at line 24
  [2.64]

  [3.140]
  + Last_focus_time = App.getTime() -- https://love2d.org/forums/viewtopic.php?p=249700
• edit in main.lua at line 178
  [7.135]

  [8.1486]
  + function App.focus(in_focus)

  + if in_focus then

  + Last_focus_time = App.getTime()

  + end

  + end

  +
• edit in main.lua at line 185
  [8.1512]

  [3.478]
  + -- ignore events for some time after window in focus

  + if App.getTime() < Last_focus_time + 0.01 then

  + return

  + end
• edit in main.lua at line 194
  [9.836]

  [3.553]
  + -- ignore events for some time after window in focus

  + if App.getTime() < Last_focus_time + 0.01 then

  + return

  + end
• edit in main.lua at line 203
  [8.1591]

  [3.628]
  + -- ignore events for some time after window in focus

  + if App.getTime() < Last_focus_time + 0.01 then

  + return

  + end