Fix flaky test

cypress/e2e/with_mock_data/systems.cy.ts

@@ -577,11 +577,25 @@ describe('Systems', () => {
     });
   });
 
-  it('edits a system from a landing page', () => {
+  it.only('edits a system from a landing page', () => {
+    Cypress.on('uncaught:exception', (err) => {
+      // we expect a 3rd party library error with message 'list not defined'
+      // and don't want to fail the test so we return false
+
+      console.log(err.message);
+      if (err.message.includes('ResizeObserver')) {
+        return false;
+      }
+      // we still want to ensure there are no other unexpected
+      // errors, so we let them fail the test
+    });
     cy.visit('/systems/65328f34a40ff5301575a4e3');
 
     cy.findByRole('button', { name: 'systems page actions menu' }).click();
-    cy.findByText('Edit').click();
+    cy.findByRole('menuitem', { name: 'Edit' }).should('exist');
+    cy.findByRole('menuitem', { name: 'Edit' }).click();
+
+    cy.findByRole('dialog', { name: 'Edit System' }).should('exist');
 
     cy.findByLabelText('Name *').clear();
     cy.findByLabelText('Name *').type('System name');