Allow hiding of category name in color legend item

ApplicationLibCode/ProjectDataModel/RimColorLegendItem.h

@@ -41,6 +41,8 @@ public:
     RimColorLegendItem();
     ~RimColorLegendItem() override;
 
+    void setCategoryFieldsHidden( bool hidden );
+
     void setValues( const QString& categoryName, int categoryValue, const cvf::Color3f& color );
     void setCategoryValue( int categoryValue );
     void setReadOnly( bool doReadOnly );