Gameplay patch 5 (DEM import)

The fifth gameplay patch is now live with the following changes:

Fixed a problem with train cars sometimes briefly appearing in the wrong position
Fixed LOD building for train cars to happen behind the scenes instead of overlapping the base model
Fixed discontinuities in normals and texture coordinates for some models generated from cross sections like road surfaces
Fixed material colour loading from .mtl files (fixes Class 205 cable colours)
Fixed custom materials to use smoothness slider value when also using a metallic/smoothness map (was previously always 100% causing a shiny surface)
Fixed possibly missing custom models on the Laguna Paiva workshop route
Possibly fixed grass sometimes being loaded only partially
Restored some brown vegetation near the North Landen portal

Fixed editor side panel bug where a wrong item would be shown after selecting an option from a list
Fixed parsing of certain length and position values to only accept decimal period (instead of comma) in some editor fields, regardless of the operating system setting

Fixed train editor to highlight some parts of the models correctly when hovering over with the mouse pointer
Added 3D-gizmo

Fixed grids to remain intact when increasing divisions by more than one at a time
Fixed adding a new grid to also open the model node parts of the properties on the side panel
Fixed terrain triangulation not being triggered when adding a new terrain node on top of an existing edge
Fixed a possible crash when adding or removing terrain nodes
Attempted to fix a possible crash when quickly updating terrain presets or other types

The route editor now supports two methods of importing digital elevation maps (DEM):

Adding a grid, loading the height of its nodes from a greyscale image file and converting them into terrain nodes
Loading terrain nodes directly from a text file (through the route properties side panel option)

See the route editor guide DEM chapter for more information:
https://steamcommunity.com/sharedfiles/filedetails/?id=1668734729

Fixed a rare signal animation related crash
Unified cab control and train editor model highlighting. The old outlining method for cab controls had performance issues
Removed option to reference models from other vehicles and routes (as a model source)
Removed legacy pack support (not the newer "pack2")
Optimised grass rendering memory consumption

Another patch coming soon