fix #48, no not show incoming message notifications at currently open thread

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt

@@ -597,6 +597,7 @@ class ThreadActivity : SimpleActivity() {
 
     @Subscribe(threadMode = ThreadMode.ASYNC)
     fun refreshMessages(event: Events.RefreshMessages) {
+        notificationManager.cancel(threadId)
         messages = getMessages(threadId)
         setupAdapter()
     }

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt

@@ -570,5 +570,5 @@ fun Context.showReceivedMessageNotification(address: String, body: String, threa
         .addAction(R.drawable.ic_check_vector, getString(R.string.mark_as_read), markAsReadPendingIntent)
         .setChannelId(channelId)
 
-    notificationManager.notify(messageId, builder.build())
+    notificationManager.notify(threadID, builder.build())
 }