Fair Limiter

- Extra toggle switch that allows to choose between simulation (CPU intensive but better sound quality) or approximation of the tubes. - Double tap on a control to revert to the default value. - Higher precision control when dragging. Vertical dragging on a knob makes large changes to the knob value, while horizontal dragging on a knob applies very fine changes to the knob value. - The oversample rate and the tube simulation/approximation toggle value are not saved anymore with the presets, but are kept as a global state. This allows to choose the best setting for your current hardware (higher oversample rate gives better results but uses more CPU power. Simulation gives better results but uses more CPU power). Flipping through the presets will not change your CPU usage setting anymore.