Possible fix for weird sorting orders on initial load

Use category sorting as default sorting mode.

src/sortfilterroomlistmodel.h

@@ -41,6 +41,6 @@ Q_SIGNALS:
     void filterTextChanged();
 
 private:
-    RoomSortOrder m_sortOrder;
+    RoomSortOrder m_sortOrder = Categories;
     QString m_filterText;
 };