Replace BackgroundColorRole/TextColorRole with
BackgroundRole/ForegroundRole and explicit deprecate them for 5.13
Change-Id: I6b0d99844a32d2f5fdfd1878317a7b7422b800d3
Reviewed-by: Samuel Gaist <samuel.gaist@idiap.ch>
Reviewed-by: Luca Beldi <v.ronin@yahoo.it>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>