Added functionality to remember last artist and tag radio station.
Workaround for skipping tracks.   OnClick event is being called but not sure why.
Added check to ensure playlist is defined
Removed redundant call to select facade item
Added ability to add user via enter not just via button
Merge remote-tracking branch 'remotes/upstream/FEAT_Last.fm_API_2.0' into 1.3.0RC_SEB_ADDONV3_HomeY