GUI does not allow changing FPS beyond default values

[donkeyrat]

The GUI only allows 1, 5, 10, 20, and 50 fps, while the CLI project allows much greater fine-tuning. I'd like to be able to have the full power of the CLI.

[tonynoce]

Or at least one must be able to use the most popular ones like : 12 - 23.976 - 24 - 25 - 29.97 - 30