Allow RGB support

[TheRedfoox]

Allow you to forward the RGB of the keyboard and mouse so that Synapse, iCUE and others can control the RGB

[omelettedufromagee]

Kinda related to #255
Best is to configured the "in-memory" RGB behavior while the device is directly connected to the PC and then plug it into the DeskHop board.

[hrvach]

Apologies for the inconvenience. This will most likely not be fixed, as the security model of the device is strictly against any software on either PC connecting to the commonly-shared device (keyboard, mouse, etc).