Make FPS cap in lobby a switch in settings (PC)

@Cosmic_Naute I completely disagree with all of your reasons about it being a good "benchmark".

The lobby has zero things rendered that are 3D. My integrated GPU can render the main lobby at high FPS. In game, your performance will drop due to having actual 3D objects being rendered and shadows being drawn, etc.

I do agree with higher FPS simply looking better lol.
I do agree with the option of limiting FPS in lobby, just like it limits if its not the foreground window.

But yeah, I agree with it being an option, and I think it broke stuff in game as my FPS is extremely unstable and there is a lot of jittering.

@Cosmic_Naute Agreed. It also makes the UI less responsive, causing bad inputs when moving around quickly like we could before (especially a problem for character select when trying to make a quick change), ruins the high frame rate animation of opening loot boxes (which was a small joy of mine which is now gone, thx), and is just jarring when you go from fluid high frame rate down to 60 fps, it's not a good experience and there is no reason not to give an option to control if it's on or off.

Besides given that the menus aren't taxing the GPU much anyway, they have a much lower power draw even when displaying high frame rates, making the change even more pointless from a power "saving" perspective. From what I can tell my GPU uses almost the same wattage, ~128 watts, both now with the 60 fps cap vs before at my monitors 175hz refresh rate. Maybe it saved like ~10 watts? Would need a toggle to be able to actually check.... so... please give us the option to choose how we want it to run.