Add navigation to dashboard & resources to lovelace editor + icons

[spacegaier]

Breaking change

Proposed change

Navigation options + icons as proposed in the linked FR.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes Add dashboards/resources to Lovelace menu in Configure UI mode #5172
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

[Misiu]

@spacegaier the first element on the list doesn't have an icon.
Maybe the view-list icon?

[spacegaier]

I know, because I did not find a god one on my first glance. Your proposal looks quit similar to the next two which feels confusing. I would prefer something more distinct like this: