MM-52428: Fix few E2E integration tests (#23311)

* Fixed E2E Integration tests

* Fixed step to close emoji picker

e2e-tests/cypress/tests/integration/channels/keyboard_shortcuts/ctrl_cmd_shift_slash/react_to_center_spec.js

@@ -191,7 +191,9 @@ describe('Keyboard shortcut CTRL/CMD+Shift+\\ for adding reaction to last messag
         Cypress._.times(3, () => {
             doReactToLastMessageShortcut('CENTER');
             cy.get('#emojiPicker').should('exist');
-            cy.get('body').click();
+
+            // # Click anywhere to close emoji picker
+            cy.get('#channelHeaderInfo').click();
             cy.get('#emojiPicker').should('not.exist');
         });