fix: [attribute:editAttribute] synchronisation support when attributes got merged into an object.
fix: [attribute:editAttribute] synchronisation support when attributes
got merged into an object.

MISP/MISP,SteveClement/MISP,SteveClement/MISP,FIRSTdotorg/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,MISP/MISP,FIRSTdotorg/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP