Fix search bar search param encoding

What does this MR do?

Fixes the search bar search param encoding. Current filtered search is converting spaces into %20 when they should be converting to +

Are there points in the code the reviewer needs to double check?

Side effects

Why was this MR needed?

Fixes regression in search query URL

Screenshots (if relevant)

None

Does this MR meet the acceptance criteria?

Yes

What are the relevant issue numbers?

Closes #27398 (closed)