feat: Ability to delete a contact (#2984)

This change allows the administrator user to delete a contact and its related data like conversations, contact inboxes, and reports.

Fixes #1929

app/javascript/dashboard/helper/actionCable.js

@@ -19,6 +19,7 @@ class ActionCableConnector extends BaseActionCableConnector {
       'conversation.typing_off': this.onTypingOff,
       'conversation.contact_changed': this.onConversationContactChange,
       'presence.update': this.onPresenceUpdate,
+      'contact.deleted': this.onContactDelete,
     };
   }
 
@@ -115,6 +116,14 @@ class ActionCableConnector extends BaseActionCableConnector {
   fetchConversationStats = () => {
     bus.$emit('fetch_conversation_stats');
   };
+
+  onContactDelete = data => {
+    this.app.$store.dispatch(
+      'contacts/deleteContactThroughConversations',
+      data.id
+    );
+    this.fetchConversationStats();
+  };
 }
 
 export default {