Sunset Harbor Update

Includes the following:

-General support for Sunset Harbor DLC
-Vanilla integration into the track and above ground station picker ui
-Change the planar position of any underground station track with horizontal and vertical sliders
-Add and remove any underground station track
-Revert station back to original track orientation
-New Pillars added for Vanilla
-MetroOverhaul rails added to vanilla tracks (replaces square tracks)
-Various enhancements and bug fixes