Make the reuse button part of the canvas

Moves it out of stripeButtons and into canvasButtons.

Will move download to its own thing later.

Change-Id: Iaf18914b29a6283c3bade954f1adb3f206c9c911
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/834
Make "more details" button bigger 'n' prettier

Change-Id: I81a370a910c0cec269a000c9dcaac8461d3421b0
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/830
Make the download pane into its own dialog

Change-Id: Ia92545ed1ef7f2e4ba7934c682eef684a22ca17f
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/841
Merge "Make the reuse button part of the canvas"
Merge "Make "more details" button bigger 'n' prettier"
Merge "Make the download pane into its own dialog"