Sensors now work over broadcast pipe

Added Polynomal actor
Added Item adding dialog
Added Factor Actor

src/ui/itemscrollbox.h

@@ -21,6 +21,10 @@ class ItemScrollBox : public QWidget
 private:
     std::vector< ItemWidget* > widgets_;
 
+signals:
+    void deleteRequest(const ItemData& item);
+
+
 public:
     explicit ItemScrollBox(QWidget *parent = nullptr);
     ~ItemScrollBox();