[FEATURE] Respect map custom saber colors

[kuba2k2]

Is your feature request related to a problem? Please describe.

All multiplayer levels use a yellow-ish and pink/purple saber colors by default, for every map. This is only configurable by manually choosing a custom color set.

Describe the solution you'd like

Multiplayer maps should default to red/blue colors (I still see no reason why Beat Saber didn't do it that way). Maps which have custom colors defined (modded maps) should present these colors in multiplayer, too.

Additional context

Most maps that I'm playing are best with their custom or default color scheme, and it's pretty annoying to have to change it each time when playing on multiplayer.