Chore: Contact Sidebar, conversation cleanup (#908)

- Update sidebar design
- Move every contact data to contacts module
- Revert go to next conversation feature
- Fix issues with new conversation in action cable
- Escape HTML content
- Broadcast event when conversation.contact changes.

Co-authored-by: Sojan <sojan@pepalo.com>

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

@@ -9,10 +9,16 @@ jest.mock('axios');
 describe('#actions', () => {
   describe('#getConversation', () => {
     it('sends correct actions if API is success', async () => {
-      axios.get.mockResolvedValue({ data: { id: 1, meta: {} } });
+      axios.get.mockResolvedValue({
+        data: { id: 1, meta: { sender: { id: 1, name: 'Contact 1' } } },
+      });
       await actions.getConversation({ commit }, 1);
       expect(commit.mock.calls).toEqual([
-        [types.default.ADD_CONVERSATION, { id: 1, meta: {} }],
+        [
+          types.default.ADD_CONVERSATION,
+          { id: 1, meta: { sender: { id: 1, name: 'Contact 1' } } },
+        ],
+        ['contacts/SET_CONTACT_ITEM', { id: 1, name: 'Contact 1' }],
       ]);
     });
     it('sends correct actions if API is error', async () => {