Re-organized logic into functions to make the code a bit more organized.
Added logic to adjust pencil color from (0.2,0.2,0.2) -> (0.1,0.1,0.1) to make it visible in undiscovered areas of the map.
Changed undiscovered grid color from fully opaque dark grey to a barely transparent white so that it is mostly only visible in undiscovered areas.

Fixed black primary roads, should be gray again.

Removed override of style intiialization function on map, instead re-create the style each time map is selected and initialize the map myself so that the first time we open it the style will be correct. Should be much more compatible with other mods now.