Fix wxSearchCtrl buttons on DPI change

src/generic/srchctlg.cpp

@@ -248,6 +248,7 @@ wxEND_EVENT_TABLE()
 wxBEGIN_EVENT_TABLE(wxSearchCtrl, wxSearchCtrlBase)
     EVT_SEARCH_CANCEL(wxID_ANY, wxSearchCtrl::OnCancelButton)
     EVT_SIZE(wxSearchCtrl::OnSize)
+    EVT_DPI_CHANGED(wxSearchCtrl::OnDPIChanged)
 wxEND_EVENT_TABLE()
 
 wxIMPLEMENT_DYNAMIC_CLASS(wxSearchCtrl, wxSearchCtrlBase);
@@ -1234,6 +1235,11 @@ void wxSearchCtrl::OnSize( wxSizeEvent& WXUNUSED(event) )
     LayoutControls();
 }
 
+void wxSearchCtrl::OnDPIChanged(wxDPIChangedEvent &WXUNUSED(event))
+{
+    RecalcBitmaps();
+}
+
 #if wxUSE_MENUS
 
 void wxSearchCtrl::PopupSearchMenu()