rearranging self-validation prevention
rearranging self-validation prevention

A single button is employed. Now, we apply attributes as to whether the user is allowed to validate or not. If they can, we add `type="submit"`. Otherwise, we add `type="button" disabled` and also include a div explaining that the user cannot self-validate.
jarmokivekas/osm-tasking-manager2,KaiDalgleish/osm-tasking-manager2,baditaflorin/osm-tasking-manager2,ethan-nelson/osm-tasking-manager2,stefanb/osm-tasking-manager2,ethan-nelson/osm-tasking-manager2,baditaflorin/osm-tasking-manager2,stefanb/osm-tasking-manager2,jarmokivekas/osm-tasking-manager2,baditaflorin/osm-tasking-manager2,stefanb/osm-tasking-manager2,stefanb/osm-tasking-manager2,baditaflorin/osm-tasking-manager2,ethan-nelson/osm-tasking-manager2,jarmokivekas/osm-tasking-manager2,KaiDalgleish/osm-tasking-manager2,ethan-nelson/osm-tasking-manager2,KaiDalgleish/osm-tasking-manager2,jarmokivekas/osm-tasking-manager2,KaiDalgleish/osm-tasking-manager2