Fixes modal button alignment

What does this MR do?

Fixes the alignment of the modal footer buttons

Screenshot

before:

after:

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides

Closes #45453 (closed)