Fix vue test stacktraces (#12612)

* Issue 10786 - Add unit test for Home component

* Issue 10786 - Improve test setup and test invite parameter variations

* Issue 10786 - Improve Vue.js test isolation by adding async keyword to dispatch function

* Issue 10786 - Missing action does not need to be awaited

* fix(vuejs-unit-tests): Fewer stacktraces in avatar.spec.js

* No more stacktraces in avatar.spec.js

* Register dummy directive in chatCard.spec.js

* Resolve stacktraces in column.spec.js

* Resolve stacktrace in notifications.spec.js

* Resolve warnings in user.spec.js

* Resolve asynchronous stacktrace from home.spec.js

* Remove unnecessary mount call.

* Clear up some let clutter in column.spec.js

website/client/tests/unit/components/notifications.spec.js

@@ -20,7 +20,7 @@ describe('Notifications', () => {
               lvl: 0,
             },
             flags: {},
-            preferences: {},
+            preferences: { suppressModals: {} },
             party: {
               quest: {
               },
@@ -55,6 +55,7 @@ describe('Notifications', () => {
 
     expect(wrapper.vm.userHasClass).to.be.true;
   });
+
   describe('user exp notifcation', () => {
     it('notifies when user gets more exp', () => {
       const expSpy = sinon.spy(wrapper.vm, 'exp');