Fix app directory listing and order alphabetically

 $:render("/home/admin/runinenv /home/admin/app python -V")
 $:render("du -sh /home/admin/app")
 <pre style=font-size:.8em>\
-$for line in get_output("ls -lthr /home/admin/app/run | cut -d' ' -f5-").splitlines():
-    $if not line: $continue
-    $ size, month, day, yeartime, path = line.split()
+$for line in get_output("ls -lh /home/admin/app/run").splitlines():
+    $ parts = line.split()[-5:]
+    $if len(parts) < 5:
+        $continue
+    $ size, month, day, yeartime, path = parts
     $month $day $yeartime \
     $if size:
         <a href=/machines/dev/$path>\