RSM

..F....... [ZBXNEXT-4312] updated to latest from ^/trunk;
fixed condlicts in:
 - frontends/php/js/class.calendar.js
 - frontends/php/include/html.inc.php
 - sass/stylesheets/sass/screen.scss

Made minor changes in foloowing methods:
 - closeDialogHandler()
 - calendarKeyDownHandler()
 - create_calendar()