Revert "[models:law] Removed validation of URLs in model-tier #834 840"
Revert "[models:law] Removed validation of URLs in model-tier #834 840"

This reverts commit b9a23e4d827d099e4f0ea0b88434e36573792af8.

beomjae/app,mbhicks90/myvotes.ca,huulbaek/app,DemocracyOS/app,DemocracyOS/app,DemocraciaEnRed/comunas,josuedor/app,beomjae/app,Nicolas-Lebreton/app,alexproca/democracy-os,PartidoDeLaRed/app,moustachu/democracy-os-app,MareAtlantica/democracyos,vntrp/app,ben-pr-p/app,josuedor/app,AbraaoAlves/app,mbhicks90/myvotes.ca,indiofran/app,vntrp/app,DemocraciaEnRed/bahiablanca,moustachu/democracy-os-app,solde9/app,ManuH/app,ben-pr-p/app,dkrathi457/app,solde9/app,atlatszo/evoks,alexproca/democracy-os,fonorobert/evoks,PartidoDeLaRed/app,ManuH/app,DemocraciaEnRed/comunas,atlatszo/evoks,indiofran/app,radvansky-tomas/app,piratenfraktion-nrw/app,piratenfraktion-nrw/app,radvansky-tomas/app,EuParticipo/Caxias,MareAtlantica/democracyos,dkrathi457/app,fonorobert/evoks,AbraaoAlves/app,huulbaek/app,EuParticipo/Caxias,Nicolas-Lebreton/app,DemocraciaEnRed/bahiablanca