Fix Getting Member Objects

It seems that there are no guarantees that we will have a room member event available when a message has arrived especially early on after room load so we should create member object unconditionally and make it the responsibility of the caller to only ask for real senders.

BUG: 498649

src/neochatroom.cpp

@@ -1729,10 +1729,6 @@ void NeoChatRoom::setRoomState(const QString &type, const QString &stateKey, con
 
 NeochatRoomMember *NeoChatRoom::qmlSafeMember(const QString &memberId)
 {
-    if (!isMember(memberId)) {
-        return nullptr;
-    }
-
     if (!m_memberObjects.contains(memberId)) {
         return m_memberObjects.emplace(memberId, std::make_unique<NeochatRoomMember>(this, memberId)).first->second.get();
     }