Daily development (MXB related)

[philiaN]

* MXB: fixed bridges support

* MXB: completed support for open centerlines

[philiaN]

* MXB: fixed the flickering terrain

[philiaN]

* MXB: improved normal maps support for terrains

[philiaN]

* MXB: misc tasks for release

[philiaN]

* MXB: more work to support straight rhythm

* MXB: improvements to the tyres' simulation

[philiaN]

* MXB: ported the possibility to lower the volume of remote bikes

* MXB: more work to support straight rhythm

* MXB: improvements to the tyres' simulation

[philiaN]

* GPB / WRS / KRP / MXB: fixed a live screens bug in VR

* MXB: small rider physics improvements

* MXB: misc tasks for release

[philiaN]

* GPB / WRS / KRP / MXB: fixed a track layout objects bug

* MXB: more work to support straight rhythm

[philiaN]

* MXB: more work to support straight rhythm

[philiaN]

* MXB: improvements to the rider physics

[philiaN]

* MXB: more work to support straight rhythm

[philiaN]

* MXB: misc tasks for release

[philiaN]

* MXB: misc tasks for release

[philiaN]

* MXB: misc tasks for release

[philiaN]

* MXB: misc tasks for release