Increase message_limit for ExtJS HttpStateProvider

Changed message_limit and delay

This will fix the annoying tree problem.

If there are more than 200 cache files modx won't load the tree position cache file (modx-resource-tree.msg.php).
The cache files are inside the core/cache/registry/state/ys/user.. directory.

I reduced the delay so the level of the tree will be saved faster.
(cherry picked from commit b9823230c354b7d838e086c2875a1919fd9295c9)