Build 16986457

- New keybind (unassigned by default) to promote the current track selection to a new station. Combine with Shift to instead assign the tracks as platforms of the nearest station. Combine with Alt to instead demote platforms into normal track.
- Fix: pasting stations in the clipboard with Ctrl-Shift-V sometimes did not properly register as a new station and the station nameplate did not show up (cosmetic issue)
- Fix: straight guide disappears on zoom in when track node is offscreen
- Fix: changing building type of selected building must reset its decal