[Ohrrpgce] SVN: teeemcee/12771 Textbox editor now previews using in-game slices, so it shows the choice

[subversion at HamsterRepublic.com]

teeemcee
2022-02-07 22:28:33 -0800 (Mon, 07 Feb 2022)
250
Textbox editor now previews using in-game slices, so it shows the choicebox

This also fixes the textbox not being centered when the game resolution wasn't
320 wide.

Moved init_text_box_slices to common.rbas and deleted redundant code for
portraits.
---
U   wip/common.bi
U   wip/common.rbas
U   wip/custom_udts.bi
U   wip/customsubs.bi
U   wip/customsubs.rbas
U   wip/game.bas
U   wip/game.bi
U   wip/textboxedit.bas