feat: Add reports about live agent load (#4537)

* feat: Add reports about live agent load

app/javascript/dashboard/store/modules/specs/agents/actions.spec.js

@@ -4,6 +4,7 @@ import * as types from '../../../mutation-types';
 import agentList from './fixtures';
 
 const commit = jest.fn();
+const dispatch = jest.fn();
 global.axios = axios;
 jest.mock('axios');
 
@@ -97,7 +98,7 @@ describe('#actions', () => {
   describe('#updatePresence', () => {
     it('sends correct actions if API is success', async () => {
       const data = { users: { 1: 'online' }, contacts: { 2: 'online' } };
-      actions.updatePresence({ commit }, data);
+      actions.updatePresence({ commit, dispatch }, data);
       expect(commit.mock.calls).toEqual([
         [types.default.SET_AGENT_UPDATING_STATUS, true],
         [types.default.UPDATE_AGENTS_PRESENCE, data],