Shut qt up about models passed to QML

Shutup qt about below

```
SortFilterRoomListModel is neither a QObject, nor default- and copy-constructible, nor uncreatable. You should not use it as a QML type.
SortFilterRoomTreeModel is neither a QObject, nor default- and copy-constructible, nor uncreatable. You should not use it as a QML type.
SortFilterSpaceListModel is neither a QObject, nor default- and copy-constructible, nor uncreatable. You should not use it as a QML type.
```

src/models/sortfilterroomlistmodel.h

@@ -31,6 +31,7 @@ class SortFilterRoomListModel : public QSortFilterProxyModel
 {
     Q_OBJECT
     QML_ELEMENT
+    QML_UNCREATABLE("")
 
     /**
      * @brief The text to use to filter room names.

src/models/sortfilterroomtreemodel.h

@@ -32,6 +32,7 @@ class SortFilterRoomTreeModel : public QSortFilterProxyModel
 {
     Q_OBJECT
     QML_ELEMENT
+    QML_UNCREATABLE("")
 
     /**
      * @brief The text to use to filter room names.

src/models/sortfilterspacelistmodel.h

@@ -20,6 +20,7 @@ class SortFilterSpaceListModel : public QSortFilterProxyModel
 {
     Q_OBJECT
     QML_ELEMENT
+    QML_UNCREATABLE("")
 
     /**
      * @brief The number of spaces in the model.