Support dual-pane deck picker on large screens

I'm currently working on converting the deck picker into a fragment (for the navigation drawer), and I got tired of launching the incredibly slow Nexus 10 emulator on my machine to debug issues with the dual-pane tablet mode. So I thought it would be great to support it on smaller tablets in landscape mode

On my Nexus 7 there wasn't enough space for the chart, so I didn't include it.