Add FPS Display to F5 (Debug) menu

[RedlineTriad]

Purpose

Implements/Fixes #1252

Open Questions and Pre-Merge TODOs

• This fix is tested on the same branch it is PR'ed to.
• I correctly commented my code
• My code is indented with tabs and not spaces
• This PR does not include any unnecessary .meta, .prefab or .unity (scene) changes
• This PR does not bring up any new compile errors
• This PR has been tested in editor
• This PR has been tested in multiplayer

[DooblyNoobly]

just let me know when this is ready for review/merge

[fomalsd]

Thanks for contributing!
Wasn't aware that you could do multiple clauses in ternary operation :)
I believe FPS counter should be a Mathf.Floored integer – there isn't much purpose for that decimal, and it takes a bit of extra space.
Also because it gets updated every frame it strobes really fast and that makes it hard to read – please consider making readings once every half second or so.
Code looks very clean – keep it up! Just address these two things and it would be perfect

[fomalsd]

Looks really good :)