(fix) O3-3417: Disable save button while loading form dependencies

Requirements

[x] This PR has a title that briefly describes the work done including the ticket number. If there is a ticket, make sure your PR title includes a conventional commit label. See existing PR titles for inspiration.
[ ] My work conforms to the OpenMRS 3.0 Styleguide and design documentation.
[ ] My work includes tests or is validated by existing tests.

This PR introduces functionality that disables the save buttons while form dependencies are loading.