Fix keydown behaviour on create work item form

What does this MR do and why?

In create work item form, when title input field is in focus and user uses keyboard shortcut cmd+enter or ctrl+enter, form was submitted twice leading to creation of two issues instead of one.

References

Fixes: #554831

Screenshots or screen recordings

Before	After
Screen Recording 2025-11-13 at 16.59.41.mov	Screen Recording 2025-11-13 at 16.58.50.mov