[Feature Request]: Macropad and keyboard support for EX-WebThrottle

[MegaBlackJoe]

Problem/idea statement

There are devices on the market that are called macropads - these are small keyboards with a knob that can be used as throttles to control the locomotives. The knob just emulates the button press. But in order for this to work, EX-WebThrottle needs to support keyboard shortcuts and not just mouse control. Most macropads can't do keyboard combinations and support 2 key presses at once. In order to implement this feature it will be necessary to bind the entire command to 1 key button press. For example - space = enable track power, 3 = select locomotive, keyboard arrow up = increase throttle.

Alternatives or workarounds

Although hardware throttles are already supported, it takes time to build them, whereas macropads are readily available and cheap.

Additional context

No response