Fix an event name from animationend to transitionend
Fix an event name from animationend to transitionend

Closes #646

mario-orlicky/wekan,Serubin/wekan,ddanssaert/wekan,ddanssaert/wekan,mario-orlicky/wekan,ahmadassaf/libreboard,johnleeming/wekan,jtickle/wekan,oliver4u/sap-wekan,nztqa/wekan,ddanssaert/wekan,FSFTN/Wekan,GhassenRjab/wekan,wekan/wekan,oliver4u/sap-wekan,FSFTN/Wekan,libreboard/libreboard,wekan/wekan,GhassenRjab/wekan,libreboard/libreboard,ahmadassaf/libreboard,pro-to-tip/wekan,GhassenRjab/wekan,nztqa/wekan,jtickle/wekan,nztqa/wekan,wekan/wekan,oliver4u/sap-wekan,ahmadassaf/libreboard,Serubin/wekan,oliver4u/WEKAN_runpartner,wekan/wekan,oliver4u/WEKAN_runpartner,pro-to-tip/wekan,Serubin/wekan,jtickle/wekan,wekan/wekan,johnleeming/wekan,johnleeming/wekan,johnleeming/wekan,mario-orlicky/wekan,oliver4u/WEKAN_runpartner