Add getModifierName to BColorModifier class so when can assert which modifier is being used Change-Id: I2bc2a36470a449df4dc84a8440f232149c1f8278 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153048 Tested-by: Jenkins Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>