Add support for Equipment_Lightbulb for light badge

[vguna]

The problem

I mainly configure my semantic model with having equipment directly in locations. So If I look at the Locations section with all the rooms, I can see e.g. lightbulbs directly under Devices of a location - not Properties. Now I fell in love with the badges displayed on the cards. As it seems there is currently no support for lights coming from Equipment_Lightbulbs. I found this PR https://github.com/openhab/openhab-webui/issues/556 which nicely shows the graceful fallback behavior, if no points etc. are configured, but looking at the equipment directly.

Your suggestion

It would be awesome if there would also be a fallback to Equipment_Lightbulbs to show the light badge.

Your environment

runtimeInfo:
  version: 3.1.0
  buildString: Release Build
locale: de-DE
systemInfo:
  configFolder: /etc/openhab
  userdataFolder: /var/lib/openhab
  logFolder: /var/log/openhab
  javaVersion: 11.0.12
  javaVendor: Azul Systems, Inc.
  javaVendorVersion: Zulu11.50+19-CA
  osName: Linux
  osVersion: 5.10.52-v7l+
  osArchitecture: arm
  availableProcessors: 4
  freeMemory: 116663208
  totalMemory: 309374976
bindings:
  - amazonechocontrol
  - astro
  - bluetooth
  - goecharger
  - http
  - knx
  - mail
  - miio
  - mqtt
  - network
  - openweathermap
  - smartmeter
  - systeminfo
  - telegram
  - tr064
  - weathercompany
  - weatherunderground
clientInfo:
  device:
    ios: false
    android: false
    androidChrome: false
    desktop: true
    iphone: false
    ipod: false
    ipad: false
    edge: false
    ie: false
    firefox: true
    macos: false
    windows: true
    cordova: false
    phonegap: false
    electron: false
    nwjs: false
    webView: false
    webview: false
    standalone: false
    os: windows
    pixelRatio: 1
    prefersColorScheme: light
  isSecureContext: false
  locationbarVisible: true
  menubarVisible: true
  navigator:
    cookieEnabled: true
    deviceMemory: N/A
    hardwareConcurrency: 8
    language: de
    languages:
      - de
      - en-US
      - en
    onLine: true
    platform: Win32
  screen:
    width: 1920
    height: 1080
    colorDepth: 24
  support:
    touch: false
    pointerEvents: true
    observer: true
    passiveListener: true
    gestures: false
    intersectionObserver: true
  themeOptions:
    dark: light
    filled: true
    pageTransitionAnimation: default
    bars: filled
    homeNavbar: default
    homeBackground: default
    expandableCardAnimation: default
  userAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101
    Firefox/90.0
timestamp: 2021-08-15T12:01:57.164Z

[ctosae]

+1