Format: ControlDisabledBackdrop FrameName,
Example: ControlDisabledBackdrop "ButtonDisabledBackdropTemplate",
Purpose: BACKDROP when the parentFrame is disabled. Can be skiped in which case ControlBackdrop will be displayed even in Disabled State.
Used in: MENU, POPUPMENU, BUTTON, GLUEBUTTON, TEXTBUTTON, GLUETEXTBUTTON, SCROLLBAR, SLIDER, CONTROL, TEXTAREA, EDITBOX, GLUEEDITBOX, GLUECHECKBOX, CHECKBOX