Removed a lot of unnecessary includes and fixed the compile errors.

diff --git a/windows/focus.c b/windows/focus.c
index dc79a53..d99496f 100644
--- a/windows/focus.c
+++ b/windows/focus.c
@@ -14,6 +14,7 @@
 #include "winpos.h"
 #include "hook.h"
 #include "message.h"
+#include "queue.h"
 #include "task.h"
 #include "debugtools.h"