Move scale option from perspective correction to lens/geometry

rtgui/lensgeom.h

@@ -22,21 +22,25 @@
 
 #include "lensgeomlistener.h"
 #include "toolpanel.h"
+#include "adjuster.h"
 
 class LensGeometry final :
     public ToolParamBlock,
-    public FoldableToolPanel
+    public FoldableToolPanel,
+    public AdjusterListener
 {
 
 protected:
     MyComboBoxText*     method;
     Gtk::Button*        autoCrop;
     LensGeomListener*   rlistener;
+    Adjuster*           scale;
     Gtk::CheckButton*   fill;
     bool                lastFill;
     sigc::connection    fillConn;
 
     rtengine::ProcEvent EvTransMethod;
+    rtengine::ProcEvent EvTransScale;
 public:
     static const Glib::ustring TOOL_NAME;
 
@@ -55,6 +59,8 @@ public:
         rlistener = l;
     }
 
+    void adjusterChanged (Adjuster* a, double newval) override;
+
 private:
     IdleRegister idle_register;
 };