Recycled prototype of UiViewer
UiViewer: set up a standard appearance
dryed TestSchlegel by using SchlegelTransformer instead of copying the code of SchlegelTransformer
SchlegelView: use the UiViewer to manage jReality in the SchlegelView
PointPicker: use the UiViewer to manage jReality in the PointPicker
MainFrame: use SchlegelView class like before
Merge branch 'UiViewer'