Fix entity changeset after slug generation
Fix entity changeset after slug generation

Solves #1453
jmcclell/DoctrineExtensions,notrix/DoctrineExtensions,pmishev/DoctrineExtensions,hhjcz/DoctrineExtensions,teohhanhui/DoctrineExtensions,aramalipoor/DoctrineExtensions,nirav-programmer/DoctrineExtensions,birko/DoctrineExtensions,edigu/DoctrineExtensions,Padam87/DoctrineExtensions