Issue title: Documentation Links in more places - (?) icons
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## The request

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Add (?) icons to places in the UI. 

Card Picker - Next to the name of the card
Card Editor - Next to the title

## The alternatives

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## Additional information

Make it easier for the Users to find documentation of lovelace
 Comments: 
 Comment 0: I don't think it's needed in the Card Picker personally. There's already a preview for each card to give an idea of exactly what it's like. Putting two dozen help icons on the card picker would just add clutter imo. And it would make it slightly more annoying to select the card, because now some of the tap target would have to be given up in order to make those help icons clickable.

For the Card Editors I think it's a good idea but would prefer it in the top right corner imo. 
 Comment 1: Yea I dont think we should add it in all places for sure. And I agree top right of the editor in the title space is the best place
 Comment 2: And a back button in the card editor to return to the picker :-)
{'source': 'GithubIssues', 'repo_name_with_owner': 'home-assistant/frontend', 'issue_id': 608580818, 'repo_stars': 2002.0}