Variable Frame Rate for Visualization.

[Bluejee]

Please view the Contributing Guidelines for information on Contributing.

Is your feature request related to a problem? Please describe.
The Visualization framerate is fixed upon initialization. As the speed of the simulation is dependent upon the framerate we require that it run fast when we do not want to observe it. and run slow when we want to observe it. so there should be an option to control the frame rate of the simulation. Or at least an option to switch between maximum speed and the capped framerate.

Describe the solution you'd like
Give the user a button or a key binding like done for the analysis that would enable them to switch between the framerate cap and max spped.

Describe alternatives you've considered
Implement a scroll bar providing the user control over the frame rate. (Difficult but maybe better.)

Additional context
Add any other context or screenshots about the feature request here.