Allow default icons to be used in badges

[drzony]

This change allows to use default icons in badges.

Example below will show temperature, battery icon (changing based on value) and battery %

title: Devices
type: entities
entities:
  - entity: sensor.some_temperature
    type: 'custom:multiple-entity-row'
    name: Temp sensor
    secondary_info: last-changed
    entities:
      - entity: sensor.some_temperature_battery
        name: false
        icon: null
      - entity: sensor.some_temperature_battery
        name: false

Possibly fixes # 61

[benct]

This should already work by using icon: true..?

[drzony]

Not exactly, when icon: true, the icon is taken from attributes.icon which is undefined (I think it's only defined when icon is overridden in entity settings) in case of default entity icons (MQTT batterry and link-quality). This means that in else if (entity.icon) return this.renderIcon(entity); the property entity.icon is undefined and the icon is not rendered at all.

I made above change not to break current behavior. But it also can be done by adding additional property like use_default_icon or something

[drzony]

Here is an image of how this works:

[benct]

Changed this slightly so that it should be possible to use icon: true to achieve the same thing. I'll release a new version later today if I get the time.

Thanks for the contribution, let me know if it somehow doesn't work as expected.

[drzony]

Had some time to update the card, everything works as expected :)