Fix regex for URL validation. Closes #451
Fix regex for URL validation. Closes #451

radvansky-tomas/app,fonorobert/evoks,120photo/app,PartidoDeLaRed/app,ben-pr-p/app,dkrathi457/app,DemocraciaEnRed/bahiablanca,DemocraciaEnRed/bahiablanca,EuParticipo/Caxias,josuedor/app,beomjae/app,josuedor/app,piratenfraktion-nrw/app,vntrp/app,solde9/app,atlatszo/evoks,CivicTechFR/DemocracyOSFR,valentinchaput/app,moustachu/democracy-os-app,DemocraciaEnRed/comunas,valentinchaput/app,d-cent/democracyos,indiofran/app,AbraaoAlves/app,mgarciaisaia/democracy-os-ues,mbhicks90/myvotes.ca,huulbaek/app,AbraaoAlves/app,Nicolas-Lebreton/app,radvansky-tomas/app,kant/app,maiklaguna/app,CivicTechFR/DemocracyOSFR,ManuH/app,MareAtlantica/democracyos,beomjae/app,dkrathi457/app,MareAtlantica/democracyos,Nicolas-Lebreton/app,fonorobert/evoks,ben-pr-p/app,DemocracyOS/app,alexproca/democracy-os,kant/app,solde9/app,vntrp/app,10Pines/app,DemocraciaEnRed/comunas,okfn-brasil/euvoto,120photo/app,piratenfraktion-nrw/app,EuParticipo/Caxias,indiofran/app,mbhicks90/myvotes.ca,moustachu/democracy-os-app,PartidoDeLaRed/app,okfn-brasil/euvoto,DemocracyOS/app,ManuH/app,alexproca/democracy-os,atlatszo/evoks,huulbaek/app