poll mpd once per second, no need to do it more often

src/ncmpcpp.h

@@ -31,7 +31,7 @@ using namespace NCurses;
 
 typedef std::pair<std::string, std::string> string_pair;
 
-const int ncmpcpp_window_timeout = 500;
+const int ncmpcpp_window_timeout = 250;
 
 const std::string home_folder = getenv("HOME") ? getenv("HOME") : "";