Leading and trailing whitespace in the searchbar should be ignored

Feature request by @danielea submitted using the Feedback form (oid 47):

Small change

In the search box on the home screen maybe use a .trim() or .trimLeft() before sending it to the backend. Often when copying stuff into the search bar it will have a space on the left and then the exams or lectures are not returned properly. Or trim on the backend whatever is fine.

Just a small QoL but not important