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.