Classic Theme: disabled "checked" checkboxes should be grey CORE-18609 and not black, like they erroneously were. This patch does not seem to have any impact on how they are rendered for themed ros. Ftr: We experimented also with COLOR_GRAYTEXT instead of COLOR_BTNSHADOW but that did result in incorrect drawing of disabled "checked" checkboxes for the 'High Contrast' Color Schemes.