turns out super- chords to get to textinput

Dependencies

• [2] XDB5D7H7 some early returns should be asserts
• [3] KMRJOSLY bugfix: delete selection before pasting
• [4] AOIRVVJA revert selection logic to before commit 3ffc2ed8f
• [5] VJ77YABH more efficient undo/redo
• [6] DRFE3B3Z mouse buttons are integers, not strings
• [7] AVLAYODP much simpler
• [*] BULPIBEG beginnings of a module for the text editor

Change contents

• replacement in text.lua at line 143
  [2.33]→[2.33:98](∅→∅)
  − if App.alt_down() then return end

  − assert(not App.cmd_down())
  [2.33]

  [3.1234]
  + if App.alt_down() or App.cmd_down() then return end