Config UI setup syntax needs to be updated
Hi,

I'm getting this error with the following config:
```
[4/23/2020, 11:42:59] [Old Room TV] webOS - init - initializing devices
[4/23/2020, 11:42:59] [Old Room TV] -------------------------------------------
[4/23/2020, 11:42:59] [Old Room TV] webOS - init - no tv configuration found
[4/23/2020, 11:42:59] [Old Room TV] Missing devices or tvs in your platform config
[4/23/2020, 11:42:59] [Old Room TV] -------------------------------------------
[4/23/2020, 11:42:59] [New Room TV] webOS - init - initializing devices
[4/23/2020, 11:42:59] [New Room TV] -------------------------------------------
[4/23/2020, 11:42:59] [New Room TV] webOS - init - no tv configuration found
[4/23/2020, 11:42:59] [New Room TV] Missing devices or tvs in your platform config
[4/23/2020, 11:42:59] [New Room TV] -------------------------------------------
```

```json
{
            "name": "Old Room TV",
            "ip": "10.0.0.62",
            "mac": "XX:XX:XX:XX:XX:XX",
            "prefsDir": "~/.webosTv",
            "pollingInterval": 5,
            "legacyTvService": false,
            "showInputButtons": false,
            "volumeControl": "false",
            "volumeLimit": 100,
            "channelControl": false,
            "mediaControl": false,
            "inputs": [
                {
                    "appId": "cdp-30",
                    "name": "Plex"
                },
                {
                    "appId": "netflix",
                    "name": "Netflix"
                },
                {
                    "appId": "youtube.leanback.v4",
                    "name": "YouTube"
                },
                {
                    "appId": "amazon.global",
                    "name": "Prime Video"
                }
            ],
            "infoButtonAction": "HOME",
            "platform": "webostv"
        },
        {
            "name": "New Room TV",
            "ip": "10.0.0.63",
            "mac": "XX:XX:XX:XX:XX:XX",
            "prefsDir": "~/.webosTv",
            "pollingInterval": 5,
            "legacyTvService": false,
            "showInputButtons": false,
            "volumeControl": "false",
            "volumeLimit": 100,
            "channelControl": false,
            "mediaControl": false,
            "inputs": [
                {
                    "appId": "cdp-30",
                    "name": "Plex"
                },
                {
                    "appId": "netflix",
                    "name": "Netflix"
                },
                {
                    "appId": "youtube.leanback.v4",
                    "name": "YouTube"
                },
                {
                    "appId": "amazon.global",
                    "name": "Prime Video"
                }
            ],
            "infoButtonAction": "HOME",
            "platform": "webostv"
        }
```

I restarted Homebridge, the TVs, revoked pairing but I didn't see pairing requests from the plugin.