card colors: force overwrite of text color
card colors: force overwrite of text color

This allows to show checks on the color with the correct color instead
of plain white.

libreboard/libreboard,wekan/wekan,GhassenRjab/wekan,wekan/wekan,GhassenRjab/wekan,libreboard/libreboard,wekan/wekan,wekan/wekan,GhassenRjab/wekan,wekan/wekan