[Feature] Display Titles of Saved Blocks In "Add Block" Interface

[jessecowens]

Is your feature request related to a problem? Please describe.
Locating a specific saved block in the "Add Block" interface can be difficult, especially if the user has saved blocks that look largely similar.

Describe the solution you'd like
Display the saved block title in the "Add Block" interface to show the user which saved block is being displayed.

Additional context
This feature is related to user feedback from the BoldGrid Support Forum.

[nicolepaschen]

this was added with the search block library functionality!