Moved "Copy metadata unchanged" to PP3, and added "strip metadata" mode

Fixes #3647

rtgui/toolpanelcoord.h

@@ -38,8 +38,7 @@
 #include "epd.h"
 #include "sharpening.h"
 #include "labcurve.h"
-#include "exifpanel.h"
-#include "iptcpanel.h"
+#include "metadatapanel.h"
 #include "crop.h"
 #include "icmpanel.h"
 #include "resize.h"
@@ -149,6 +148,7 @@ protected:
     BayerRAWExposure* bayerrawexposure;
     XTransRAWExposure* xtransrawexposure;
     FattalToneMapping *fattal;
+    MetaDataPanel* metadata;
 
     std::vector<PParamsChangeListener*> paramcListeners;
 
@@ -161,9 +161,6 @@ protected:
     ToolVBox* transformPanel;
     ToolVBox* rawPanel;
     ToolVBox* waveletPanel;
-    Gtk::Notebook* metadataPanel;
-    ExifPanel* exifpanel;
-    IPTCPanel* iptcpanel;
     ToolBar* toolBar;
 
     TextOrIcon* toiE;