FIX: [STUDIO-1574] not switch filament preset after wizard

Change-Id: Id830b6c8f4ffd76a0b58c51ba892a79f075c0cea

src/slic3r/GUI/Widgets/ComboBox.cpp

@@ -263,13 +263,7 @@ void ComboBox::keyDown(wxKeyEvent& event)
             } else {
                 break;
             }
-            {
-                wxCommandEvent e(wxEVT_COMBOBOX);
-                e.SetEventObject(this);
-                e.SetId(GetId());
-                e.SetInt(GetSelection());
-                GetEventHandler()->ProcessEvent(e);
-            }
+            sendComboBoxEvent();
             break;
         case WXK_TAB:
             HandleAsNavigationKey(event);

src/slic3r/GUI/Widgets/ComboBox.hpp

@@ -74,6 +74,8 @@ protected:
     
     void OnEdit() override;
 
+    void sendComboBoxEvent();
+
 #ifdef __WIN32__
     WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) override;
 #endif
@@ -85,8 +87,6 @@ private:
     void mouseWheelMoved(wxMouseEvent &event);
     void keyDown(wxKeyEvent &event);
 
-    void sendComboBoxEvent();
-
     DECLARE_EVENT_TABLE()
 };