Improve mask visibility selection in GUI

rtengine/rtengine.h

@@ -484,6 +484,8 @@ public:
 
     virtual void        updateUnLock() = 0;
 
+    virtual void        setLocallabMaskVisibility(int locallColorMask, int locallExpMask) = 0;
+
     /** Creates and returns a Crop instance that acts as a window on the image
       * @param editDataProvider pointer to the EditDataProvider that communicates with the EditSubscriber
       * @return a pointer to the Crop object that handles the image data trough its own pipeline */