fix: Enhance CRM UI (#1397)

* feat: Sort by name
* feat: Fetch labels from sidebar
* Remove unused language file
* Add beta tag to contacts
* Add timeMixin, reduce font-size
* Remove unused methods
* Remove unused prop
* Disabled footer if no contacts or invalid page
* Add keyup for input
* Fix conversation not loading if there are no active conversations
* return last_seen_at as unix time
* Fix contact edit modal
* Add loader for edit contact button
* Fix review comments

app/javascript/dashboard/i18n/locale/en/settings.json

@@ -121,7 +121,7 @@
   "SIDEBAR": {
     "CONVERSATIONS": "Conversations",
     "REPORTS": "Reports",
-    "CONTACTS": "Contacts",
+    "CONTACTS": "Contacts (Beta)",
     "SETTINGS": "Settings",
     "HOME": "Home",
     "AGENTS": "Agents",