Fixed search field blur not removing focus

What does this MR do?

Adds a blur event to remove focus styling from the search input.

Any particular reason we were looking for clicks on the document? I can't see why we would be.

What are the relevant issue numbers?

Closes #18670 (closed)

Screenshots (if relevant)

Added 1 commit:

• 855b4608 - Fixed issue with focusing out of dropdown not hiding menu

Added 1 commit:

• 06f40798 - Fixed issue with focusing out of dropdown not hiding menu

Added 1 commit:

• fa270fbe - Checks for relatedTarget

Added 590 commits:

• fa270fbe...44b8b77e - 586 commits from branch master
• 77c8600a - Fixed search field blur not removing focus
• c9cc64f5 - Fixed issue with focusing out of dropdown not hiding menu
• 1ba09307 - Checks for relatedTarget
• e1d38bc9 - Fixed failing search category tests

Status changed to merged

mentioned in commit c051630a

mentioned in issue #19355 (closed)

Removed ~149423 label

Picked into 8-9-stable, will be in 8.9.4.

mentioned in commit 966eedd3