Added some advanced menu item features

src/scrollinterface.h

@@ -0,0 +1,14 @@
+#pragma once
+
+namespace espgui {
+class ScrollInterface {
+public:
+    virtual bool skipScroll() const { return false; }
+};
+
+template<bool TScroll>
+class StaticScrollBehaviour : public ScrollInterface {
+public:
+    bool skipScroll() const override { return TScroll; }
+};
+} // namespace espgui