[minor] Adding type to buttons to avoid triggering onSubmit inside a form

[Jialecl]

Checklist
(Check off all the items before submitting)

• Build process is done without errors. All tests pass in the /lib directory.
• Self-reviewed the code before submitting.
• Meets accessibility standards.
• Added/updated documentation to /website as needed.
• Added/updated tests as needed.

Purpose
Buttons now have specific types to avoid conflicts inside a form element.