Moved most builtin controls structures into their respective C file.
Created new controls.h file private to user32.dll and moved remaining
builtin controls definitions there.
diff --git a/windows/nonclient.c b/windows/nonclient.c
index 9cfc809..54be17c 100644
--- a/windows/nonclient.c
+++ b/windows/nonclient.c
@@ -14,12 +14,10 @@
#include "user.h"
#include "heap.h"
#include "dce.h"
+#include "controls.h"
#include "cursoricon.h"
-#include "dialog.h"
-#include "menu.h"
#include "winpos.h"
#include "hook.h"
-#include "scroll.h"
#include "nonclient.h"
#include "queue.h"
#include "selectors.h"
