Include cleanup: Selection.hpp

It does not need 3DScene.hpp and Model.hpp
And it does not to be included by GLGizmoBase.hpp

src/slic3r/GUI/Jobs/ArrangeJob.cpp

@@ -1,6 +1,7 @@
 #include "ArrangeJob.hpp"
 
 #include "libslic3r/MTUtils.hpp"
+#include "libslic3r/Model.hpp"
 
 #include "slic3r/GUI/Plater.hpp"
 #include "slic3r/GUI/GLCanvas3D.hpp"

src/slic3r/GUI/Jobs/RotoptimizeJob.cpp

@@ -3,6 +3,7 @@
 #include "libslic3r/MTUtils.hpp"
 #include "libslic3r/SLA/Rotfinder.hpp"
 #include "libslic3r/MinAreaBoundingBox.hpp"
+#include "libslic3r/Model.hpp"
 
 #include "slic3r/GUI/Plater.hpp"
 

src/slic3r/GUI/Jobs/SLAImportJob.cpp

@@ -8,6 +8,8 @@
 #include "slic3r/GUI/GUI_ObjectList.hpp"
 #include "slic3r/Utils/SLAImport.hpp"
 
+#include "libslic3r/Model.hpp"
+
 #include <wx/dialog.h>
 #include <wx/stattext.h>
 #include <wx/combobox.h>