add collision model parameter for robot visu

Load the collision model of a robot if specified.  The user is now
unable to switch between the different visualization modes. However,
loading the collision model uses less memory.

source/RobotAPI/components/ArViz/Coin/VisualizationRobot.cpp

@@ -39,6 +39,10 @@ namespace armarx::viz::coin
             {
                 // Always load full model. Visualization can choose between full and collision model
                 VirtualRobot::RobotIO::RobotDescription loadMode = VirtualRobot::RobotIO::eFull;
+                if (data::ModelDrawStyle::COLLISION)
+                {
+                    loadMode = VirtualRobot::RobotIO::eCollisionModel;
+                }
                 ARMARX_INFO << "Loading robot from " << fullFilename;
                 result = VirtualRobot::RobotIO::loadRobot(fullFilename, loadMode);
                 result->setThreadsafe(false);