Garage simulation for DUALR3 (motor mode)
### What issue do you have? Please be as thorough and explicit as possible.

I'm using a DUALR3 in Motor Mode to control a roller shutter (which is my garage door).

The only values it has for `showAsMotor` option are: `blind`, `door`, and `window`. Changing the device model in Multi Channel Devices section, and selecting a different Show As (simulation) doesn't affect it anyhow.

Is it possible to simulate a Garage Door with a DUALR3 in Motor Mode?

### Details of your setup.

I'm using Homebridge 1.3.4 with `homebridge-ewelink` 7.1.0