6.0.1 web config Feature Options tab spinning gear
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**Describe The Problem:**
Upgraded from a working 5.5.4 to 6.0.1 and the new web config ui gets a spinning gear on the `Feature Options` tab with an error in the console. From what I can tell functionality wise things are working correctly in HomeKit still with no changes required on my end. Using the previous defaults without issue. 

**To Reproduce:**
<!-- Steps to reproduce the behavior. -->

**Logs:**

With debug logging on

```
[3/27/2023, 1:54:20 PM] [Homebridge UI] [homebridge-unifi-protect] Incoming Request: /getDevices
```

Browser
```
Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'filter')
    at showDevices (index.html?origin=http%3A%2F%2Fhomebridge&v=6.0.1:445:37)
```

**Homebridge Configuration:**

```json
        {
            "controllers": [
                {
                    "address": "xxx",
                    "password": "xxx",
                    "username": "xxx"
                }
            ],
            "_bridge": {
                "username": "0E:35:A3:8E:D9:BC",
                "port": 58971
            },
            "platform": "UniFi Protect"
        },
```

**Screenshots:**
![Screenshot 2023-03-27 at 1 48 34 PM](https://user-images.githubusercontent.com/458486/228024378-37c53b04-fd5b-4204-b0cd-ed9a097a4094.png)
![Screenshot 2023-03-27 at 1 49 01 PM](https://user-images.githubusercontent.com/458486/228024464-262d953a-567e-4d70-a6ad-ca1e0afc5fdb.png)

**Environment:**

* **Homebridge Version:** v1.6.0
* **Node Version:** v18.15.0
* **Homebridge-UniFi-Protect Plugin Version:**
* **UniFi Protect Version:** 2.7.33
* **UniFi Protect Controller Type:** UCKgen2+
* **UniFi Protect Controller Firmware Version:** 3.0.17
* **Apple Device and iOS / macOS / iPadOS / tvOS Version:**<!-- Type of Apple device you're using and associated OS version -->
* **Operating System and OS Version:** Debian
