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

src/ui/itemsettingswidgets/systemitemsettingswidget.h

@@ -0,0 +1,30 @@
+#ifndef SYSTEMITEMSETTINGSWIDGET_H
+#define SYSTEMITEMSETTINGSWIDGET_H
+
+#include <QWidget>
+#include <memory>
+#include "../../items/systemitem.h"
+
+namespace Ui {
+class SystemItemSettingsWidget;
+}
+
+class SystemItemSettingsWidget : public QWidget
+{
+    Q_OBJECT
+    std::weak_ptr<SystemItem> item_;
+
+private slots:
+
+    void setOn(const QString &in);
+    void setOff(const QString &in);
+
+public:
+    explicit SystemItemSettingsWidget(std::weak_ptr<SystemItem> item, QWidget *parent = nullptr);
+    ~SystemItemSettingsWidget();
+
+private:
+    Ui::SystemItemSettingsWidget *ui;
+};
+
+#endif // SYSTEMITEMSETTINGSWIDGET_H