[4.x] Show blueprint title in tree view

[mmodler]

Hey, this PR implements https://github.com/statamic/ideas/issues/854 : Show blueprint badge in tree view

The blueprint title only appears if there are 2 or more blueprints available.

I have chosen the same layout as in the entries fieldtype and did some style adjustments.

Desktop:

Mobile:

[FrittenKeeZ]

Looks pretty clean to me 👍

[mmodler]

Hey @duncanmcclean

thanks for all the fine tuning and fixing my shortcomings :)

[mmodler]

What is the merge strategy, will the pull be merged soon? Otherwise I will use it as a composer patch for now.

[duncanmcclean]

We don't have an ETA for merging this pull request. We'll get to it when we can.