[GRASS-git] [OSGeo/grass] 193559: d.text: Use standard options for colors (#2439)

[Vaclav Petras]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: 193559782a68cc999e54d94dd4402b583a0c593c
      https://github.com/OSGeo/grass/commit/193559782a68cc999e54d94dd4402b583a0c593c
  Author: Vaclav Petras <wenzeslaus at gmail.com>
  Date:   2022-08-28 (Sun, 28 Aug 2022)

  Changed paths:
    M display/d.text/main.c

  Log Message:
  -----------
  d.text: Use standard options for colors (#2439)

Both text and text background colors are now using standard options. Descriptions changed to short labels. Explanation is in the standard description. bgcolor can be none, so G_OPT_CN is used. It uses none as default which is how other modules express the same.