Tweaked activity padding+fades to account for scrollbar.
Fixed collision of activity timestamp with title.
Small style tweaks to activity action buttons.
Improved appearance on wide and tall screens.
Animated queued songs adding, removing, and escalating.
Incremented version to 1.2.1-alpha.
Merge branch 'dev' at 1.2.1-alpha.

Style tweaks to room activity feed.
Larger UI on large displays.
Added some horizontal sliding animation for song adding and removing.