Added translation using phrases

. added translation functionality by
-- adding loadPhrases-method in Controllers
-- replacing hardcoded html-text with $this->p->t(...)

application/views/widgets/filter/filter.php

@@ -168,7 +168,7 @@
 			<div class="panel panel-default">
 				<div class="panel-heading">
 					<h4 class="panel-title">
-						<a data-toggle="collapse" href="#collapseFilterHeader">Filter options</a>
+						<a data-toggle="collapse" href="#collapseFilterHeader"><?= ucfirst($this->p->t('filter', 'filterEinstellungen')) ?></a>
 					</h4>
 				</div>
 				<div id="collapseFilterHeader" class="panel-collapse collapse">