add args to some functions

Dependencies

• [2] HTWAM4NZ bugfix: scrolling in left/right movements
• [3] CBPV5SSI stop handling nil screen_line_starting_pos everywhere
• [4] 2H67P75X switch arg for a function
• [5] OGUV4HSA remove some memory leaks from rendered fragments
• [6] XNFTJHC4 split keyboard handling between Text and Drawing
• [7] 3OKKTUT4 up and down arrow now moving by screen line where possible
• [8] MP2TBKU6 bugfix: crash in Text.up() after return
• [9] HMODUNJE scroll on backspace
• [10] 2RXZ3PGO beginning of a new approach to scroll+wrap
• [11] AYE2VEGJ extract a couple of methods
• [12] KOYAJWE4 extract a couple more methods
• [13] ZZ2B5RPQ extract variables for drawing padding
• [14] 242L3OQX bugfix: ensure Cursor_line is always on a text line
• [15] KZ5GAYRP this fixes the immediate regression
• [16] ZPUQSPQP extract a few methods
• [17] KECEMMMR extract couple of functions
• [18] TRNWIQN6 more precise height calculation when scrolling up as much as possible while keeping cursor on screen
• [*] BULPIBEG beginnings of a module for the text editor

Change contents

• replacement in text.lua at line 218
  [3.3023]→[3.3023:3068](∅→∅)
  − top2 = Text.previous_screen_line(top2)
  [3.3023]

  [3.3068]
  + top2 = Text.previous_screen_line(top2, Margin_left, App.screen.width-Margin_right)
• replacement in text.lua at line 370
  [3.563]→[3.563:606](∅→∅)
  − top2 = Text.previous_screen_line(top2)
  [3.563]

  [3.77]
  + top2 = Text.previous_screen_line(top2, left, right)
• replacement in text.lua at line 561
  [2.6636]→[2.6636:6679](∅→∅)
  − top2 = Text.previous_screen_line(top2)
  [2.6636]

  [2.6679]
  + top2 = Text.previous_screen_line(top2, left, right)
• replacement in text.lua at line 658
  [3.883]→[3.947:990](∅→∅)
  − top2 = Text.previous_screen_line(top2)
  [3.883]

  [3.925]
  + top2 = Text.previous_screen_line(top2, left, right)
• replacement in text.lua at line 882
  [3.564]→[3.1391:1432](∅→∅),[3.1391]→[3.1391:1432](∅→∅)
  − function Text.previous_screen_line(pos2)
  [3.564]

  [3.1432]
  + function Text.previous_screen_line(pos2, left, right)