Add trim on submit of new board card

What does this MR do and why?

White space was being trimmed on input of the user on issue boards cards.

This MR only trims the leading and trailing whitespace on submit.

Resolves #341247 (closed)

Screenshots or screen recordings

These are strongly recommended to assist reviewers and reduce the time to merge your change.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.