Moves all the SetTextColor handing into ApplySettings and just
changes the ControlBackground depending on step state.

Change-Id: I96234b6353afada7bc77e2f641a160c1cf25f48d
Reviewed-on: https://gerrit.libreoffice.org/58857
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>