Update Cypress tests. (#2812)

* Add goToTaskList() before user logout.

* Add wait() for the dropdown menu transition

tests/cypress/integration/actions_projects/registration_involved/base_actions_project_task_user.js

@@ -1,4 +1,4 @@
-// Copyright (C) 2020 Intel Corporation
+// Copyright (C) 2020-2021 Intel Corporation
 //
 // SPDX-License-Identifier: MIT
 
@@ -112,6 +112,7 @@ context('Base actions on the project', () => {
             cy.get('.cvat-constructor-viewer').should('not.exist');
         });
         it('Logout first user, register second user, tries to create project and logout.', () => {
+            cy.goToTaskList();
             cy.logout();
             cy.goToRegisterPage();
             cy.userRegistration(firstName, lastName, userName, emailAddr, password);
@@ -141,6 +142,7 @@ context('Base actions on the project', () => {
             cy.goToTaskList();
             cy.contains('strong', taskName.secondTask).should('not.exist');
             cy.openTask(taskName.firstTask);
+            cy.goToTaskList();
             cy.logout(userName);
         });
         it('Delete the project. Deleted project not exist. Checking the availability of tasks.', () => {

tests/cypress/integration/actions_tasks_objects/case_50_settings_player_speed.js

@@ -18,7 +18,7 @@ context('Settings. "Player speed" option.', () => {
     function changePlayerSpeed(speed) {
         cy.openSettings();
         cy.get('.cvat-player-settings-speed').within(() => {
-            cy.get('.cvat-player-settings-speed-select').click();
+            cy.get('.cvat-player-settings-speed-select').click().wait(300); // Wait for the dropdown menu transition.
         });
         cy.get(`.cvat-player-settings-speed-${speed}`).click();
         cy.get('.cvat-player-settings-speed-select').should(