switch to line index in a function

Dependencies

• [2] MXA3RZYK deduce left/right from state where possible
• [3] PK5U572C drop some extra args
• [4] 242L3OQX bugfix: ensure Cursor_line is always on a text line
• [5] R22PA3XR fix a second BSOD in #4 :/
• [6] LF7BWEG4 group all editor globals
• [7] S2MISTTM add state arg to a few functions
• [8] QCPXQ2E3 add state arg to a few functions
• [9] LNUHQOGH start passing in Editor_state explicitly
• [10] OGUV4HSA remove some memory leaks from rendered fragments
• [11] CTJ3IZGS add args to some functions
• [12] CCYSVZA2 bugfix: BSOD in #4.
• [13] MYC7XR5Q bugfix: lines that aren't drawn from the start
• [14] 3OKKTUT4 up and down arrow now moving by screen line where possible
• [15] EMRPLZPW drop an arg from a function
• [16] UHB4GARJ left/right margin -> left/right coordinates
• [17] LXTTOB33 extract a couple of files
• [18] 2L5MEZV3 experiment: new edit namespace
• [19] HYEAFRZ2 split mouse_pressed events between Text and Drawing
• [*] BULPIBEG beginnings of a module for the text editor

Change contents

• replacement in text.lua at line 696
  [4.936]→[2.2884:2924](∅→∅)
  − function Text.in_line(State, line, x,y)
  [4.936]

  [4.1014]
  + function Text.in_line(State, line_index, x,y)

  + local line = State.lines[line_index]
• replacement in select.lua at line 96
  [4.46375]→[2.4182:4227](∅→∅)
  − if Text.in_line(State, line, x,y) then
  [4.46375]

  [2.4227]
  + if Text.in_line(State, line_index, x,y) then
• replacement in edit.lua at line 203
  [4.7091]→[3.15:60](∅→∅)
  − if Text.in_line(State, line, x,y) then
  [4.7091]

  [4.7173]
  + if Text.in_line(State, line_index, x,y) then
• replacement in edit.lua at line 248
  [4.8882]→[3.118:165](∅→∅)
  − if Text.in_line(State, line, x,y) then
  [4.8882]

  [4.8966]
  + if Text.in_line(State, line_index, x,y) then