Fix of #3919 (extremely wide wipe tower with 0.35mm FAST profile)

This is an excerpt from ec86d94, which was recently reverted because
the other changes from that commit broke some functionality.

src/slic3r/GUI/GUI_ObjectList.hpp

@@ -13,6 +13,8 @@
 #include "wxExtensions.hpp"
 #include "ObjectDataViewModel.hpp"
 
+#include "libslic3r/PrintConfig.hpp"
+
 class wxBoxSizer;
 class wxBitmapComboBox;
 class wxMenuItem;