Sort entities in default groups by name

[amelchio]

Description:

When used in a frontend view, having things like group.all_scripts assume a new random order on each restart is annoying. This sorts them by name instead.

Related issue (if applicable): fixes #6557

Example entry for configuration.yaml (if applicable):

group:
  default_view:
    name: Admin
    view: yes
    entities:
      - group.all_automations
      - group.all_scripts

Checklist:

If the code does not interact with devices:

• Local tests with tox run successfully.
• Tests have been added to verify that the new code works.

[mention-bot]

@amelchio, thanks for your PR! By analyzing the history of the files in this pull request, we identified @balloob, @fabaff and @pvizeli to be potential reviewers.

[balloob]

We shouldn't instantiate a method on each call to this method. Instead just copy paste the method in both places.

You should also be able to do just this: sorted(self.entities, key=lambda x: self.entities.name)

[amelchio]

Right, that key extraction ended up a bit redundant. I inlined the short version now.