Don't try to load more messages than there are in the timeline

The function call from qml is removed because it is redundant

imports/NeoChat/Page/RoomPage.qml

@@ -407,12 +407,6 @@ Kirigami.ScrollablePage {
         }
 
         Component.onCompleted: {
-            if (currentRoom) {
-                if (currentRoom.timelineSize < 20) {
-                    currentRoom.getPreviousContent(50);
-                }
-            }
-
             positionViewAtBeginning();
         }
 

src/messageeventmodel.cpp

@@ -88,7 +88,7 @@ void MessageEventModel::setRoom(NeoChatRoom *room)
     if (room) {
         m_lastReadEventIndex = QPersistentModelIndex(QModelIndex());
         room->setDisplayed();
-        if (m_currentRoom->timelineSize() < 10) {
+        if (m_currentRoom->timelineSize() < 10 && !room->allHistoryLoaded()) {
             room->getPreviousContent(50);
         }
         lastReadEventId = room->readMarkerEventId();