On enroll link, show 'already enrolled' message for users who are
On enroll link, show 'already enrolled' message for users who are

Resolves #593

feelfreelinux/WikiEduDashboard,KarmaHater/WikiEduDashboard,majakomel/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,Wowu/WikiEduDashboard,feelfreelinux/WikiEduDashboard,Wowu/WikiEduDashboard,KarmaHater/WikiEduDashboard,sejalkhatri/WikiEduDashboard,KarmaHater/WikiEduDashboard,MusikAnimal/WikiEduDashboard,alpha721/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,feelfreelinux/WikiEduDashboard,Wowu/WikiEduDashboard,alpha721/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,sejalkhatri/WikiEduDashboard,Wowu/WikiEduDashboard,sejalkhatri/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,majakomel/WikiEduDashboard,MusikAnimal/WikiEduDashboard,adamwight/WikiEduDashboard,adamwight/WikiEduDashboard,sejalkhatri/WikiEduDashboard,KarmaHater/WikiEduDashboard,MusikAnimal/WikiEduDashboard,adamwight/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,majakomel/WikiEduDashboard,MusikAnimal/WikiEduDashboard,alpha721/WikiEduDashboard,majakomel/WikiEduDashboard,alpha721/WikiEduDashboard,sejalkhatri/WikiEduDashboard,feelfreelinux/WikiEduDashboard