fixed enabling of some context menu items added "remove all subgroups" to context menu
fixed enabling of some context menu items
added "remove all subgroups" to context menu


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