UI text improvements for setting the station/user timezones

Added info icon in the add-show form for timezone setting

airtime_mvc/application/views/scripts/form/add-show-when.phtml

@@ -59,6 +59,7 @@
         <dt id="add_show_timezone-label">
             <label class="required">
                 <?php echo $this->element->getElement('add_show_timezone')->getLabel() ?>
+                <span class="show_timezone_help_icon"></span>
             </label>
         </dt>
         <dd id="add_show_timezone-element">