zxtune-qt: fix lost playlist items drag'n'drop feature.
Update PKGBUILD.
zxtune-android: do not use fixed width for current/total time panes.
zxtune-android: support custom browser sorting schemes.
zxtune-android: initial version of www.zxart.ee music catalog support.
zxtune-android: implement TTL for zxart catalogue cache (7 days for authors, 60 days for parties, 1 day for top tracks).
zxtune-android: support sharing tracks from zxart.ee catalogue.
zxtune-android: support 'rate this app' action from main menu.
zxtune-android: make own copies of system icons.
Update changelog.