SCRATCH move icons over to Env, instance proxy model to gui

logic/InstanceList.h

@@ -181,12 +181,3 @@ protected:
 	QSet<QString> m_groups;
 	SettingsObjectPtr m_globalSettings;
 };
-
-class InstanceProxyModel : public GroupedProxyModel
-{
-public:
-	explicit InstanceProxyModel(QObject *parent = 0);
-
-protected:
-	virtual bool subSortLessThan(const QModelIndex &left, const QModelIndex &right) const;
-};