Resolve "Confirmation pops up when saving a snippet"

What does this MR do?

Fixes the snippet edit form's submission. Changes in %13.2 introduced a buggy behavior when the submission of the form has been interrupted by a confirmation popup. This MR addresses that.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

References #229849 (closed) #230402 (closed)