Search: 1.Select first item in the search list by default

2. Show "Search in English" checkbox only, when Slicer is localized
3. Suppress search window hiding when leave the 3D-scene

src/slic3r/GUI/MainFrame.cpp

@@ -1267,7 +1267,12 @@ void MainFrame::select_tab(size_t tab/* = size_t(-1)*/)
         }
         // Show/Activate Settings Dialog
         if (m_settings_dialog->IsShown())
+#ifdef __WXOSX__ // Don't call SetFont under OSX to avoid name cutting in ObjectList
             m_settings_dialog->Hide();
+#else
+            m_settings_dialog->SetFocus();
+        else
+#endif
         m_settings_dialog->Show();
     }
     else if (m_layout == slNew) {