* Fix for #19072
PR #19072 introduced the custom_effect feature but it didnt make it optional as the documentation states.
This causes error on startup and the component does not work.
```
Error while setting up platform flux_led
Traceback (most recent call last):
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/helpers/entity_platform.py", line 128, in _async_setup_platform
SLOW_SETUP_MAX_WAIT, loop=hass.loop)
File "/usr/lib/python3.5/asyncio/tasks.py", line 400, in wait_for
return fut.result()
File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
raise self._exception
File "/usr/lib/python3.5/concurrent/futures/thread.py", line 55, in run
result = self.fn(*self.args, **self.kwargs)
File "/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/light/flux_led.py", line 135, in setup_platform
device[CONF_CUSTOM_EFFECT] = device_config[CONF_CUSTOM_EFFECT]
KeyError: 'custom_effect'
```
Changing this line to make the custom_effect optional as the original intention.
* Update flux_led.py
Flux Led controllers support defining a custom effect. User may define
up to 16 colors, speed of switching between them, and transition type.
Additional changes:
- add support for reporting currently running effect on the controller.
- make effects list sorted, so it's easier to find specific effect in
the list.
* Address inconsistent behavior between different controllers.
Correct issue with comparison that was preventing white value slider from being shown.
* Add white mode for Flux LED
* Call _bulb.turnOn() after bulb properties have been set to prevent immediate on action
* Only use existing brightness if rgb is None to prevent unexpected recalculation of passed rgb values.
* Remove blank line
* Undo change so current brightness is used in all cases.
* Simplify conditionals.
* Send white_value on service call.
* Remove extra blank line
* Further simplification of conditionals
* Requested changes
* Do not call getRgb if not needed
* Update log message
* Allow independent control of white level on flux_led component.
Also preserve brightness on color change.
* Limit white value support to RGBW mode.
* Requested changes.
* Correct liniting issues
* Formatting
* Handle turn_on situation when no color is set
As is, an error gets thrown when turn_on is called without an HS value. By adding an if statement, we only try to set RGB if an HS value is applied.
* Fix Whitespace Issues
* Made Requested Changes
* Accept and report both xy and RGB color for lights
* Fix demo light supported_features
* Add new XY color util functions
* Always make color changes available as xy and RGB
* Always expose color as RGB and XY
* Consolidate color supported_features
* Test fixes
* Additional test fix
* Use hue/sat as the hass core color interface
* Tests updates
* Assume MQTT RGB devices need full RGB brightness
* Convert new platforms
* More migration
* Use float for HS API
* Fix backwards conversion for KNX lights
* Adjust limitless min saturation for new scale
* Entity#unique_id defaults to None
* Initial commit entity registry
* Clean up unique_id property
* Lint
* Add tests to entity component
* Lint
* Restore some unique ids
* Spelling
* Remove use of IP address for unique ID
* Add tests
* Add tests
* Fix tests
* Add some docs
* Add one more test
* Fix new test…
* flux_led: support for property "available"
* Implemented changes from code review
* Implemented changes from code review
* Implemented changes from code review
* Extend schema
* Update ordering
* Add line breaks
* Align callback name with other platforms
* ALign callbackname with other platforms
* Update callback name to match other platforms
* Update callback name
* Update callback name
