Disable engineering diffraction gui

qt/scientific_interfaces/EnggDiffraction/EnggDiffractionViewQtGUI.cpp

@@ -22,7 +22,8 @@ namespace MantidQt {
 namespace CustomInterfaces {
 
 // Add this class to the list of specialised dialogs in this namespace
-DECLARE_SUBWINDOW(EnggDiffractionViewQtGUI)
+// Temporarily disabled to prevent freezing when opening the file dialog.
+// DECLARE_SUBWINDOW(EnggDiffractionViewQtGUI)
 
 const double EnggDiffractionViewQtGUI::g_defaultRebinWidth = -0.0005;