variant widget: bool is now displayed as True/False instead of X or no X

source/ArmarXGui/libraries/VariantWidget/VariantWidget.cpp

@@ -51,7 +51,7 @@ namespace armarx
             };
 
             BoolVariantDataWidget(const VariantDataPtr& v):
-                disp {DisplayOption::X}
+                disp {DisplayOption::Boolalpha}
             {
                 auto l = new QVBoxLayout;
                 l->setContentsMargins(0, 0, 0, 0);