refs #1331, #1353, #1483: revert r7578 and finally apply same hack as in Modelica.Mechanics.Rotational.Interfaces.Support to draw a background rectangle with a defined lineColor and that does not have pattern=LinePattern.None

git-svn-id: https://svn.modelica.org/projects/Modelica/branches/maintenance/3.2.1@7580 7ce873d0-865f-4ce7-a662-4bb36ea78beb