Improve auto-closing of dialog boxes.

  - Don't close boxes owned by 'explorer.exe'.
  - Close dialog parented by csrss.exe ("Unable to locate component/dll")
  - Various cleanups

Patch from Bronek Kozicki.


[SVN r34536]

tools/build

@@ -1 +1 @@
-Subproject commit 467ba04af33b2dc60b29a991582fe6c14ccf0436
+Subproject commit 8fd23e4502d90bf2580443856b19e32f267b22e8