Code review comment for lp:~vthompson/music-app/fixes-1308048-music-tab-cover-sizes

To expedite any opinions, this is what it looks like when the app starts [1] and after the toolbar minimizes a few seconds later [2]. I'm not sure I personally like having smaller icons on the Music tab, but I think it improves the usability issues described in the bug and also makes it easier to see the content while moving through the list quickly.

[1] http://i.imgur.com/Yq2rcy5.png
[2] http://i.imgur.com/efhUf01.png