Show streaming FPS in some UX

[nv-jakob]

Is your feature request related to a problem? Please describe.
Can't easily see the streaming FPS in a good way, only way is the big window.

Describe the solution you'd like
Maybe good to show the FPS in the minimized window? Or maybe a floating HUD that is in the top corner that shows the FPS? On that follows the user's view (not fully headlocked but soft follow)-

Describe alternatives you've considered
Have to open the big window to see the FPS-

Additional context
N/A