fix: Hanging protocol state fixes (#3242)

* fix: Some residual issues with hanging protocol after state sync

fix: Some issues introduced by the state syncing changes

* fix: PR fixes, mostly code cleanup

* Improve a race condition in an automated test

* Remove obsolete code

* PR fixes

platform/viewer/cypress/integration/measurement-tracking/OHIFStudyBrowser.spec.js

@@ -51,6 +51,8 @@ describe('OHIF Study Viewer Page', function() {
   });
 
   it('performs double-click to load thumbnail in active viewport', () => {
+    // Have to finish rendering the image before this works
+    cy.wait(250);
     cy.get('[data-cy="study-browser-thumbnail"]:nth-child(2)').dblclick();
 
     //cy.get('@viewportInfoBottomLeft').should('contains.text', expectedText);