[Enhancement] Hide sidebar on tablets (#358)

* [Enhancement] Hide sidebar on tablets

* Remove unnecessary console.log

* Use beforeDestroy

app/javascript/dashboard/components/specs/SidemenuIcon.spec.js

@@ -0,0 +1,10 @@
+import { mount } from '@vue/test-utils';
+import SidemenuIcon from '../SidemenuIcon';
+
+describe('SidemenuIcon', () => {
+  test('matches snapshot', () => {
+    const wrapper = mount(SidemenuIcon);
+    expect(wrapper.isVueInstance()).toBeTruthy();
+    expect(wrapper.element).toMatchSnapshot();
+  });
+});