refactor: set color white to application settings wheel
refactor: set color white to application settings wheel

gravitee-io/gravitee-management-webui,lauthieb/gravitee-management-webui,gravitee-io/gravitee-management-webui,M3lkior/gravitee-management-webui,lauthieb/gravitee-management-webui,gravitee-io/gravitee-management-webui,lauthieb/gravitee-management-webui,M3lkior/gravitee-management-webui