Hotfix #2 - Misc fixes

Changelog:

Game no longer crashes to "could not open file for writing" upon first launch.
More robust max clients check, possibly fixing the issue where shown server client counts doesn't match actual in the server browser.
Fixes to input bindings - please note that some pedals you currently need to bind twice for the axes to be correct, and bindings might be lost after a restart.
Fixed gear dropping back to neutral when using a h-shifter controller.
Fixed a bug resulting in the game crashing to "Bag index '0'" fatal error.
In most cases it's now possible to choose the discrete GPU as a rendering device.
Improved performance of Savolax Sandpit Reverse layout.
Various minor fixes to car art.