In wxBitmapComboBox::RecreateControl(), always get recreated control's height from the best size, and also set the ComboBox item height with CB_SETITEMHEIGHT message (fixes #12515).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65734 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/bmpcbox.cpp

@@ -131,6 +131,7 @@ void wxBitmapComboBox::RecreateControl()
     wxString value = GetValue();
     wxPoint pos = GetPosition();
     wxSize size = GetSize();
+    size.y = GetBestSize().y;
     wxArrayString strings = GetStrings();
 
     wxComboBox::DoClear();
@@ -176,6 +177,8 @@ void wxBitmapComboBox::RecreateControl()
     {
         SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
     }
+
+    ::SendMessage(GetHwnd(), CB_SETITEMHEIGHT, 0, MeasureItem(0));
 }
 
 wxBitmapComboBox::~wxBitmapComboBox()