partial fix to ui reactive attributes style diffing test

It's failing in IE10, maybe other IEs also
Remove forgotten debugging argument
Fix test expectations
fix merge
Use $.trim in StyleHandler when String.trim isn't available.

(Safari 4)
Merge branch 'fix-style-handler-test' into release-0.8.2
Maintain old behavior of plaintext password handler.

This is for backwards compatibility with old standalone DDP clients
(like the Meteor command line tool). Note that we are not maintaining
back-compat with old standalone DDP clients that implemented SRP.