Fix for GH-22
Fix for GH-22

playback.on_current_playlist_change() was not called for all changes to
the current playlist. Thus, the playback controllers internal shuffled
version of the current playlist (used for random mode), was not always
updated when the current playlist was updated.

rawdlite/mopidy,pacificIT/mopidy,swak/mopidy,glogiotatidis/mopidy,swak/mopidy,jodal/mopidy,pacificIT/mopidy,vrs01/mopidy,bencevans/mopidy,bencevans/mopidy,mokieyue/mopidy,ZenithDK/mopidy,rawdlite/mopidy,ZenithDK/mopidy,SuperStarPL/mopidy,swak/mopidy,tkem/mopidy,woutervanwijk/mopidy,quartz55/mopidy,tkem/mopidy,vrs01/mopidy,mopidy/mopidy,priestd09/mopidy,diandiankan/mopidy,vrs01/mopidy,rawdlite/mopidy,abarisain/mopidy,vrs01/mopidy,diandiankan/mopidy,hkariti/mopidy,mokieyue/mopidy,quartz55/mopidy,jmarsik/mopidy,adamcik/mopidy,ali/mopidy,bencevans/mopidy,hkariti/mopidy,tkem/mopidy,ZenithDK/mopidy,glogiotatidis/mopidy,jmarsik/mopidy,bacontext/mopidy,jodal/mopidy,swak/mopidy,hkariti/mopidy,jmarsik/mopidy,dbrgn/mopidy,pacificIT/mopidy,priestd09/mopidy,woutervanwijk/mopidy,ZenithDK/mopidy,glogiotatidis/mopidy,dbrgn/mopidy,rawdlite/mopidy,jodal/mopidy,dbrgn/mopidy,bacontext/mopidy,mopidy/mopidy,tkem/mopidy,ali/mopidy,glogiotatidis/mopidy,ali/mopidy,mokieyue/mopidy,SuperStarPL/mopidy,mopidy/mopidy,adamcik/mopidy,liamw9534/mopidy,SuperStarPL/mopidy,diandiankan/mopidy,adamcik/mopidy,jcass77/mopidy,jcass77/mopidy,abarisain/mopidy,bacontext/mopidy,quartz55/mopidy,kingosticks/mopidy,bacontext/mopidy,dbrgn/mopidy,liamw9534/mopidy,mokieyue/mopidy,priestd09/mopidy,SuperStarPL/mopidy,jcass77/mopidy,bencevans/mopidy,diandiankan/mopidy,kingosticks/mopidy,pacificIT/mopidy,jmarsik/mopidy,ali/mopidy,quartz55/mopidy,hkariti/mopidy,kingosticks/mopidy