[commhistoryd] Fix group matching when there are multiple recipients.…

… Fixes JB#55101

When you find an individual chat, use it. Incoming messages are not added to group chats.

src/textchannellistener.cpp

@@ -1516,7 +1516,7 @@ void TextChannelListener::updateCurrentGroup(int start, int end, const QModelInd
             } else if (recipients.containsMatch(recipient)) {
                 m_Group = group;
                 qCDebug(lcCommhistoryd) << Q_FUNC_INFO << "found existing group:" << m_Group.id();
-                break;
+                return;
             }
         }
     }