changed language of geoman plugin to german

public/js/app.js

@@ -236,6 +236,8 @@ map.pm.addControls({
     rotateMode: false
 });
 
+map.pm.setLang('de');
+
 // Captures drawn Geometry and opens the Create Modal
 map.on('pm:create', function (e) {
     var geojson = e.layer.toGeoJSON().geometry;