* Added backend support for JavaScript modules in custom panels.
* Fixed test_panel_custom.py
* Delete core.entity_registry
* Update panel_custom.py
* Corrected panel_custom.py with module_url.
* Rebase
* Missed elif
* Add vol.Exclusive module_url
* Correct vol.Exclusive usage
* Test for js module
* Corrected line continuation indentation
* Added webcomponent path to exclusive group
* Corrected line length
* Line break
* Test for conflicting url options
* Self -> hass fix
* Fix self -> hass again
* Use assert_setup_component
* Setup missing
* Correct test
* Fix again
* Fix
* Mising async
* Fix
* test real
* Test real
* Final
* check
* Final check
* safety
* Final commit and check
* Removed unused dependencies
* Test for multiple url options in config
