KAS: Major cleanup. Revised TrackPropEnum's named tuple to include 'intrinsic' (a boolean) to indicate if a given property is already intrinsic to the transform node (such rx, or scaleZ) versus an added attribute (such as community).  Fixed various little bugs and have some functionality in the Edit Trackway tab (the Edit Track tab is up and going).  Also, I revised the layout of the widget to have the trackway parameters above the tabs so that they are shared across the two tabs.