test(visual-regression): Add percy tests and improve coverage (#4065)

platform/app/cypress/integration/study-list/OHIFStudyList.spec.js

@@ -3,6 +3,7 @@
 describe('OHIF Study List', function () {
   context('Desktop resolution', function () {
     beforeEach(function () {
+      Cypress.on('uncaught:exception', () => false);
       cy.window().then(win => win.sessionStorage.clear());
       cy.openStudyList();