Allow for multiple mouse mods to be active at the same time

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Is your feature request related to a problem? Please describe.

Currently, only one "mouse speed mod" can be active at one time. If you have two different things trigger a mouse mod then the most recent one will overwrite any existing one. Upon releasing one of the buttons mouse mod is reset to 1 even if another is another assignment should still be active.

### Describe the solution you'd like

I would like it if multiple mouse mods could be applied at the same time by multiplying them.

In my setup I have a button to slow down the mouse for precise aiming (50%), and I also have a mouse mod on the edge of the modifier zone for my stick to give it some extra speed (150%). Ideally both should apply at the same time with a result of 150% * 50% -> 75%, instead of instantly jumping to one of the extremes depending on which one I pressed last. Additionally, if I release one of the buttons it should still respect that the other is held and use the mouse mod for that, instead of resetting it to 1.

### Describe alternatives you've considered

_No response_

### Additional context

_No response_