Added system item support, support for RGBControlers with multiple item backends, and item settings widgets

src/ui/itemsettingswidgets/relayitemsettingswidget.h

@@ -0,0 +1,24 @@
+#ifndef RELAYITEMSETTINGSWIDGET_H
+#define RELAYITEMSETTINGSWIDGET_H
+
+#include <QWidget>
+#include <memory>
+#include "../../items/relay.h"
+
+namespace Ui {
+class RelayItemSettingsWidget;
+}
+
+class RelayItemSettingsWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit RelayItemSettingsWidget(std::weak_ptr<Relay> relay, QWidget *parent = nullptr);
+    ~RelayItemSettingsWidget();
+
+private:
+    Ui::RelayItemSettingsWidget *ui;
+};
+
+#endif // RELAYITEMSETTINGSWIDGET_H