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/contact.json

@@ -108,8 +108,7 @@
         "Phone Number",
         "Conversations",
         "Last Contacted"
-      ],
-      "EDIT_BUTTON": "Edit"
+      ]
     }
   }
 }