[dev] javascript.php patch

[Jason Rust]

> We use preference values inside some of the javascript files that are included
> by javascript.php. That requires the session to be loaded so we know what user
> is logged in.

Yeah, just realized that.  Maybe only make HORDE_SESSION_NONE for IE mac
(it doesn't end up loading most of the js files anyways since it's no
longer considered a DOM browser)?  Has anybody else experienced this
problem with IE mac?

-Jason