Added static method that gets SurfaceTypeEnum's for 'anatomically' shaped surfaces (anatomical, inflated, very inflated, reconstruction)
Resolve WB-452 wb_view crash when saving a scene after unloading a midthicnkess surface: Updated ModelWholeBrain to deselect any surfaces that are not valid (in memory) is its updateModel() method.  Also, when saving a scene, update selected surface.
Added a 'Copy' button to the Help Viewer that copies the selected text to the clipboard.