Merge pull request #314 from hurzl/upstream

more crashproof album deletion
ViewPager is back
Tablet fix
Fixed drawer stack popping bug
Album details triangle has a bigger hitbox
Bigger hitbox for the song handle (for reordering).
Better looking queue layout (when the handle is hidden the cover is not stuck on the left anymore)
Cover art is now used for reordering the queue
"No Results" doesn't show up in the wrong lists in search results. Refs #301
Implemented PagerAdapter correctly. Fixes #301
add ".." (parent directory) to file browser