revalidateGroups(...): added docs, checked calls, simplified them if applicable
revalidateGroups(...): added docs, checked calls, simplified them if applicable


grimes2/jabref,mredaelli/jabref,tschechlovdev/jabref,JabRef/jabref,motokito/jabref,zellerdev/jabref,grimes2/jabref,zellerdev/jabref,mredaelli/jabref,jhshinn/jabref,mairdl/jabref,tobiasdiez/jabref,jhshinn/jabref,bartsch-dev/jabref,obraliar/jabref,mredaelli/jabref,tobiasdiez/jabref,JabRef/jabref,tobiasdiez/jabref,Mr-DLib/jabref,Braunch/jabref,ayanai1/jabref,oscargus/jabref,Braunch/jabref,jhshinn/jabref,ayanai1/jabref,shitikanth/jabref,ayanai1/jabref,jhshinn/jabref,oscargus/jabref,sauliusg/jabref,Siedlerchr/jabref,bartsch-dev/jabref,Mr-DLib/jabref,JabRef/jabref,zellerdev/jabref,Mr-DLib/jabref,Braunch/jabref,oscargus/jabref,zellerdev/jabref,tschechlovdev/jabref,grimes2/jabref,grimes2/jabref,shitikanth/jabref,Braunch/jabref,Siedlerchr/jabref,tobiasdiez/jabref,shitikanth/jabref,obraliar/jabref,sauliusg/jabref,obraliar/jabref,motokito/jabref,JabRef/jabref,Braunch/jabref,sauliusg/jabref,oscargus/jabref,motokito/jabref,mairdl/jabref,Mr-DLib/jabref,mairdl/jabref,Siedlerchr/jabref,tschechlovdev/jabref,bartsch-dev/jabref,tschechlovdev/jabref,mredaelli/jabref,tschechlovdev/jabref,motokito/jabref,mairdl/jabref,jhshinn/jabref,Mr-DLib/jabref,obraliar/jabref,shitikanth/jabref,bartsch-dev/jabref,sauliusg/jabref,bartsch-dev/jabref,ayanai1/jabref,grimes2/jabref,shitikanth/jabref,ayanai1/jabref,Siedlerchr/jabref,mairdl/jabref,oscargus/jabref,motokito/jabref,zellerdev/jabref,mredaelli/jabref,obraliar/jabref