rsx: Add 120fps and monitor refresh-rate frame limits

[elad335]

• Add limit of 120fps.
• Add frame limit according to monitor display rate, allowing many users to be able to set the frame limiter to their custom monitor's rates such as 75, 90, 144, 165 and so on.
• Add a note in frame limiter setting description about the existence of setting "Second Frame Limit" in config file, it does not describe where the file intentionally. (should only be used by experienced users)

Fixes #15257

[ElTioRata]

Could you add more common values seen on other high refresh rate monitors? (165, 180, 240, 280, 360, 480...).

[elad335]

No, there is the second setting for that. And with higher frame rate there is more chance for stability issues therefore I prefer it hidden and out of hands of newbies.

[elad335]

Added an option to set it for current monitor's refresh rate.

[elad335]

MERGED

[Kiyuja]

Awesome stuff. !65Hz user myself and it was a little awkward sometimes, not every game likes fiddling around with the VBlank setting. Caps aren't always perfect but it should definitely help with the original issue.