More VidWalls

- Enables the use of custom xxxx1.qfs/xxxx2.qfs files while still having the original + unused DLC ones

- Also enables the use of more than 1 xxxx.qfs

Support for additional track slides & video walls will be a separate plugin if it's possible to achieve

There are different types of showcase backgrounds. 1st one is getting displayed when in player or opponent menu. 2nd one is either in main menu or showcase menu. But in the original game, custom cars' showcase menu backgrounds will only be displayed inside the showcase menu. Now you can have them in the main menu, too. And the best about it is that it keeps all original menu background images + it adds support for the unused DLC ones which will only be shown in the showcase menu.

On top of that, you can have as many player/opponent car menu backgrounds as you like. See example screenshots

By the way, you can add any alternative file inside Data/FeArt/VidWall. Though i don't recommend using this system when using the HS Mixer. I will try to write a plugin for alternative slides & vidwalls

Used tool: CodeBlocks

The C++ code has been written by artificial intelligence (source included)