Simplify formatting of free form graphics

When creating a free form graphic, the graphic initially is not filled and is provided with a thin black line. When a user wants to change the format of the free form graphic it is unfortunately not enough to just double click the free form graphic "anywhere", but the user needs to double click on the border line of the free form graphic. Double clicking into the middle of the graphic will lead to open the model properties.

As soon as the fill color is changed, then a double click into the middle of the graphic will work in order to open the properties of the free form graphic.

Pls make it easier to format free form graphics for users.