tweak to event title encoding to ensure it works with German, Russian, as well as angle chars

Zotlabs/Module/Channel_calendar.php

@@ -381,7 +381,7 @@ class Channel_calendar extends \Zotlabs\Web\Controller {
 						'end' => $end,
 						'drop' => $drop,
 						'allDay' => (($rr['adjust']) ? 0 : 1),
-						'title' => $rr['summary'], 
+						'title' => html_entity_decode($rr['summary'],ENT_COMPAT,'UTF-8'), 
 						'editable' => $edit ? true : false,
 						'item' => $rr,
 						'plink' => [$rr['plink'], t('Link to source')],