Views: allow showing both icon & text title

[ildar170975]

Breaking change

Proposed change

Allow showing both an icon & a text title for a view.
By default, if an icon is defined, a text title is not shown - i.e. like it is now before this PR.
If a new show_icon_and_title is set, then both of them are shown.

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 #
• This PR is related to issue or discussion:
• Link to documentation pull request: views.markdown: allow showing icon with title home-assistant.io#42725

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