Display local-formatted timestamp for chat messages

instead of utc integer timestamp

src/components/Chat.vue

@@ -11,7 +11,7 @@
             :class="{'message-and-avatar--right': chatMessage.from !== localPeerId}">
             <PeerAvatar :peerId="chatMessage.from" />
             <span class="message"
-              :title="chatMessage.time"
+              :title="displayTime(chatMessage.time)"
               v-html="escapeHTML(chatMessage.msg)">
             </span>
           </div>
@@ -86,6 +86,9 @@ export default {
       this.$emit('send-chat-message', newMessage)
       this.newChatMessage = ""
     },
+    displayTime(time) {
+      return new Date(time).toLocaleString()
+    },
   },
 }
 </script>