* Change the 4th arg in constructor to have a default value of null
* xlcore calls this with only 3 args, so this allows compiling.

* Add dxvkVersion
* Move dxvkAsync, dxvkHud into DxvkSettings
* Set up dictionary for setting env vars. This will allow
  arbitrary number of vars to be set.
* Reworked CompatibilityTools to support new features.

* uses DXVK_FRAME_RATE, so doesn't work with wineD3D
* leave unset instead of 0, since that lets the user script it.

* Default is with no config
* Custom will allow custom path to config file
  Currently uses ~/.config/MangoHud/MangoHud.conf
  by default.
* Full shows almost everything. Very fun on a cpu with
  lots of cores and threads.

* Use ~/.xlcore/MangoHud.conf as first option for MangoHud Custom
* If that doesnt' exist, use ~/.config/MangoHud/wine-ffxiv_dx11.conf
* Finally, fall back to ~/.config/MangoHud/MangoHud.conf
If it can't find any of those, it'll just present the default.

* DXVK Hud will only accept alphanumeric, comma, and =
* MangoHud config file must exist

* If the file is not found, it will now just not set the file path
* This will cause MangoHud to fall back to default locations
  which is unlikely to work in flatpak, but that's okay.
* If the value passed is empty, it'll try to find a few default paths
  in .xlcore and .config/MangoHud

* set to empty config instead.

Remove Launcher.cs commit; out of scope.

Changes per marzent's suggestions.

* Change 1.10.2 & .3 to say safe to use.
* Change 2.0 to be less redundant.

…rework

Dxvk settings rework additions