Wait for keypress when displaying qr code

src/freedombone-app-syncthing

@@ -99,6 +99,8 @@ function syncthing_show_id {
     echo $'Your Syncthing ID code'
     echo ''
     echo "$SYNCTHING_ID" | qrencode -t UTF8
+    echo ''
+    read -n1 -rsp $"Press any key to continue..." key
 }
 
 function syncthing_add_id {