SVN Checkout: 20084

When starting MITK in Release configuration the cross hair works only sporadically.
Starting in or switching to the segmentation perspective sometimes seems to break part (or all) of the cross hair functions. Clicking somewhere on loaded and global reinited data may produce normal behaviour or one, two or all three planes of the cross hair being stuck on a certain location (neither clicking anywhere nor scrolling with the mousewheel can change the plane on a stuck render window). The pixel position and value in the footer however change according to the position clicked on.
There seems to be no favored plane.