New Sensor-> Actor -> Item system (half implemented, relay support

only), new ui, Relay dehardcoeding.

src/ui/sensorlistwidget.h

@@ -0,0 +1,18 @@
+#pragma once
+#include <QListWidget>
+#include <vector>
+#include "../sensor.h"
+
+class SensorListWidget : public QListWidget
+{
+    Q_OBJECT
+public:
+
+    SensorListWidget(QWidget *parent = nullptr);
+    SensorListWidget(SensorStore& sensorStore, QWidget* parent = nullptr);
+    virtual ~SensorListWidget(){}
+
+public slots:
+
+    void sensorsChanged(std::vector<Sensor> sensors);
+};