Cleaning up the GUI for the monitor profile and rendering intent +

output profile rendering intent + soft-proof button.

DCP profile GUI switched from 2x2 array to a single column.

rtgui/popupbutton.h

@@ -31,6 +31,7 @@ public:
     PopUpButton (const Glib::ustring& label = "");
     void show ();
     void set_tooltip_text (const Glib::ustring &text);
+    void set_sensitive (bool isSensitive=true);
 };
 
 #endif