fix: [internal] Proposals block attributes setting broken when to_ids is an array
fix: [internal] Proposals block attributes setting broken when to_ids is an array

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