open files: only send tab "click" events when the user selects an item
* before we were unnecessarily sending tab click events whenever the
  view changed, as well as when drawing the open files list

(integrated from trunk branch change 99bcce7 by Todd Whiteman <toddw@activestate.com>)
startup: add mozilla patch to force less resource identification

(integrated from trunk branch change 3ad851e by Todd Whiteman <toddw@activestate.com>)