revert selection logic to before commit 3ffc2ed8f

Dependencies

• [2] 4WAFGF4Z selection bugfix
• [3] S2YQBEYC snapshot: test for a new regression
• [4] VG75U7IM bugfix: typing should delete highlighted text
• [5] AVTNUQYR basic test-enabled framework
• [6] GN3IF4WF bugfix: pasting newlines
• [7] KOYAJWE4 extract a couple more methods
• [8] Z4XRNDTR find text
• [9] BYG5CEMV support for naming points
• [10] PFT5Y2ZY move
• [11] OTIBCAUJ love2d scaffold
• [12] AVLAYODP much simpler
• [13] XNFTJHC4 split keyboard handling between Text and Drawing
• [14] VJ77YABH more efficient undo/redo
• [15] 6DE7RBZ6 move mouse_released events to Drawing
• [16] 65XHTZEK regression: couldn't do many drawing operations because line.y was reset
• [17] FYS7TCDW bugfix
• [18] HRWN5V6J Devine's suggestion to try to live with just freehand
• [19] 2ENZW7TV select text using mouse drag
• [20] R5OKMVVC fix a regression in line wrapping
• [*] LXTTOB33 extract a couple of files
• [*] BULPIBEG beginnings of a module for the text editor
• [*] XDB5D7H7 some early returns should be asserts
• [*] CG3264MM move
• [*] X75QPYVW move Selection1 clearing past business logic
• [*] DHI6IJCN selecting text and deleting selections
• [*] ZPUQSPQP extract a few methods
• [*] AMSESRTH move some code

Change contents

• edit in text_tests.lua at line 1338
  [3.616]

  [3.616]
  + App.run_after_keychord('C-z')
• edit in text.lua at line 140
  [4.1568]→[4.3:73](∅→∅)
  − -- don't depend on state of Selection1; use keychord_pressed for that
• edit in text.lua at line 145
  [24.98]

  [4.1234]
  + if Selection1.line then

  + Text.delete_selection()

  + end
• edit in text.lua at line 272
  [25.293]

  [25.293]
  + Selection1 = {}
• edit in text.lua at line 275
  [26.41]

  [27.8673]
  + Selection1 = {}
• edit in text.lua at line 289
  [28.22]

  [25.761]
  + Selection1 = {}
• edit in text.lua at line 292
  [26.85]

  [27.9088]
  + Selection1 = {}
• edit in text.lua at line 319
  [26.151]

  [4.4433]
  + Selection1 = {}
• edit in text.lua at line 322
  [27.9989]

  [27.9989]
  + Selection1 = {}
• edit in text.lua at line 335
  [26.191]

  [29.859]
  + Selection1 = {}
• edit in text.lua at line 338
  [27.10401]

  [27.10401]
  + Selection1 = {}
• edit in text.lua at line 350
  [4.188]→[4.74:159](∅→∅)
  − if Selection1.line and not App.shift_down() then

  − Text.delete_selection()

  − end
• edit in main.lua at line 394
  [4.135]→[4.165:235](∅→∅)
  − -- don't depend on state of Selection1; use keychord_pressed for that
• edit in main.lua at line 552
  [4.5055]→[4.236:242](∅→∅),[4.242]→[2.624:674](∅→∅),[2.674]→[4.273:293](∅→∅),[4.273]→[4.273:293](∅→∅)
  − end

  − if not App.shift_down() and chord ~= 'C-c' then

  − Selection1 = {}