FIX: [STUDIO-1664] releaseobject_settings in object table

Change-Id: Ie166ef4100017be4730e8c09c932a4369f40513b
(cherry picked from commit 5813fd181ff8ff3efee42c274fdfd7b84687d86d)

src/slic3r/GUI/GUI_ObjectTable.cpp

@@ -3094,6 +3094,7 @@ ObjectTablePanel::~ObjectTablePanel()
     }*/
     if (m_top_sizer)
         m_top_sizer->Clear(true);
+    delete m_object_settings;
 
     m_filaments_name.clear();
     m_filaments_colors.clear();