SELECTSAVED handling

By default, enable the SELECTSAVED option for everyone instead
of just for Windows or Qt.  And make Qt obey the 'selectsaved'
run-time option.

It can be disabled in config.h if necessary.

src/files.c

@@ -42,7 +42,7 @@ const
 #endif
 #endif
 
-#if defined(UNIX) && defined(QT_GRAPHICS)
+#if defined(UNIX) && defined(SELECTSAVED)
 #include <sys/types.h>
 #include <dirent.h>
 #include <stdlib.h>
@@ -123,12 +123,6 @@ extern char *FDECL(translate_path_variables, (const char *, char *));
 extern char *sounddir; /* defined in sounds.c */
 #endif
 
-#if defined(UNIX) && defined(QT_GRAPHICS)
-#ifndef SELECTSAVED
-#define SELECTSAVED
-#endif
-#endif
-
 static NHFILE *NDECL(new_nhfile);
 static void FDECL(free_nhfile, (NHFILE *));
 #ifdef SELECTSAVED
@@ -1275,7 +1269,7 @@ get_saved_games()
 
     }
 #endif
-#if defined(UNIX) && defined(QT_GRAPHICS)
+#ifdef UNIX
     /* posixly correct version */
     int myuid = getuid();
     DIR *dir;