We don't currently support ordering of the apps, they appear in the order that they are enabled. One (clumsy) way you can change the order is to disable the apps that currently appear above your custom app and then re-enable them. That will move your custom app higher.
over 2 years ago
I did notice the client.instance.resize(). But the app still is confined inside an iframe with fixed max-height of 300px. Is there anyway to change the size of the iframe for the app?