* Add initial MQTT subentry support for notify entities

* Fix componts assigment is reset on device config. Translation tweaks

* Rephrase

* Go to summary menu when components are set up already - add test

* Fix suggested device info on config flow

* Invert

* Simplify subentry config flow and omit menu

* Use constants instead of literals

* More constants

* Teak some translations

* Only show save when the the entry is dirty

* Do not trigger an entry reload twice

* Remove encoding, entity_category

* Remove icon from mqtt subentry flow

* Separate entity settings and MQTT specific settings

* Remove object_id and refactor

* Migrate translations

* Make subconfig flow test extensible

* Make sub reconfig flow tests extensible

* Rename entity_platform_config step to mqtt_platform_config

* Make component unique ID independent from the name

* Move code for update of component data to helper

* Follow up on code review

* Skip dirty stuff

* Fix rebase issues #1

* Do not allow reconfig for entity platform/name, default QoS and refactor tests

* Add entity platform and entity name label to basic entity config dialog

* Rename to exclude_from_reconfig and make reconfig option not optional