[UPROPERTY](Programming/UnrealArchitecture/Reference/Properties)(EditAnywhere, Category=Activation, Meta=(EditCondition=bSupportsActivationFocus))
bool bIsModal
True to have this widget be treated as a root node for input routing, regardless of its actual parentage. Should seldom be needed, but useful in cases where a child widget should prevent all action processing by parents, even though they remain active (ex: modal popup menu).