Fix labels drag and drop from the sidebar
Fix labels drag and drop from the sidebar

This bug was introduced in e964fbb5.

Fixes #295.

johnleeming/wekan,Xperterra/wekan,araczkowski/paczka.pro,MeteorLyon/libreboard,TribeMedia/wekan,SamuelKlein/libreboard,xuxingfan/wekan,RyanTech/wekan,RyanTech/wekan,ahmadassaf/libreboard,araczkowski/paczka.pro,chrootsu/wekan,ddanssaert/wekan,ggalancs/wekan,christmo/wekan,felipecosta07/js,wykeith/cp2m,ddanssaert/wekan,ahmadassaf/libreboard,keremtiryaki/wekan,GhassenRjab/wekan,mario-orlicky/wekan,keremtiryaki/wekan,wekan/wekan,atFriendly/wekan,MickyBlue/wekan,johnleeming/wekan,mruse/wekan,gelojavonitalla/wekan,MickyBlue/wekan,wekan/wekan,chrootsu/wekan,stxh/wekan,FSFTN/Wekan,AdrianoCahete/wekan,libreboard/libreboard,nztqa/wekan,coreyaus/wekan,rpiza/wekan,pro-to-tip/wekan,wonderxboy/wekan,Zyko0/wekan,gelojavonitalla/wekan,wangdeshui/wekan,oliver4u/WEKAN_runpartner,GhassenRjab/wekan,nixoz/wekan,ddanssaert/wekan,Dragnalith/wekan,evdevgit/wekan,wekan/wekan,mario-orlicky/wekan,fisle/wekan,ndarilek/wekan,Dragnalith/wekan,assarbad/wekan,jimmiebtlr/wekan,floatinghotpot/wekan,wonderxboy/wekan,mechiles/wekan,Xperterra/wekan,jimmiebtlr/wekan,libreboard/libreboard,ahmadassaf/libreboard,assarbad/wekan,TribeMedia/wekan,araczkowski/paczka.pro,nixoz/wekan,coreyaus/wekan,Serubin/wekan,mario-orlicky/wekan,ketanbhatt/wekan,samtechie/wekan,wangdeshui/wekan,FSFTN/Wekan,pro-to-tip/wekan,evdevgit/wekan,jtickle/wekan,johnleeming/wekan,johnleeming/wekan,wonderxboy/wekan,rpiza/wekan,oliver4u/WEKAN_runpartner,xuxingfan/wekan,Serubin/wekan,bitIO/wekan,iu2fish/wekan,atFriendly/wekan,oliver4u/WEKAN_runpartner,ggalancs/wekan,felipecosta07/js,SamuelKlein/libreboard,jtickle/wekan,nztqa/wekan,umeshrs/wekan,MeteorLyon/libreboard,oliver4u/sap-wekan,Serubin/wekan,floatinghotpot/wekan,AlexanderS/wekan,GhassenRjab/wekan,AlexanderS/wekan,christmo/wekan,iu2fish/wekan,oliver4u/sap-wekan,oliver4u/sap-wekan,Zyko0/wekan,AdrianoCahete/wekan,samtechie/wekan,nztqa/wekan,fisle/wekan,stxh/wekan,bitIO/wekan,mruse/wekan,wekan/wekan,mechiles/wekan,wykeith/cp2m,wekan/wekan,ketanbhatt/wekan,ndarilek/wekan,umeshrs/wekan,jtickle/wekan