Merge pull request #19178 from overleaf/msm-frog-test-reliability

[CE] make JPG rendering test more robust

GitOrigin-RevId: f0f6b0119ed59e7f3fa8af70d69915a4d9ccda3f

server-ce/test/editor.spec.ts

@@ -180,6 +180,8 @@ describe('editor', () => {
     beforeEach(() => {
       login('user@example.com')
       cy.visit(`/project/${projectId}`)
+      // wait until the main document is rendered
+      cy.findByText(/Loading/).should('not.exist')
     })
 
     it('renders jpg', () => {