* iteratorstruct private again

* iteratorstruct private again
* removed HAVE_ZLIB check, Gzip encoding works
* remove old cond display_msg and lastmsg, obsoleted by new iterator params
* Added javascript code which will switch #global to a scrollable pane and make roombanner fixed under IE8 and the good browsers
* added some conditions in head.html that deal explicitly with IE
* Fixed message pane in mailbox not being cleared properly in IE prior to message refresh
* Page selector in mailbox safe mode now keeps the current page selected