conversationmodel: fix signal emission order to avoid crash
conversationmodel: fix signal emission order to avoid crash

Gitlab: #461

Change-Id: Id5978de02b459c34bb79a87161026fdda3793d1d

savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc