make clangd happy

Make clangd not complain about missing imports.

To be honest, I'm not sure how it managed to even compile beforehand,
especially without including DeviceModel.hpp

src/tuxclocker-qt/widgets/NodeSelector.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <boost/signals2.hpp>
+#include <QAbstractItemView>
 #include <QApplication>
 #include <QComboBox>
 #include <QDebug>
@@ -8,6 +9,8 @@
 #include <QMouseEvent>
 #include <QScrollBar>
 
+#include "DeviceModel.hpp"
+
 // TODO: If a disabled item is clicked, the item that is highlighted get selected instead
 class NodeSelector : public QComboBox {
 public: