Bug 489028 - Record last-visited time of bugs when logged in
r=glob a=justdave

Conflicts:
	Bugzilla/Bug.pm
	Bugzilla/Field.pm
	Bugzilla/Search.pm
	Bugzilla/User.pm
	Bugzilla/WebService/Constants.pm
	js/bug.js
	template/en/default/admin/params/admin.html.tmpl
Fix some syntax errors left by bug 489028