fix #728

resources/assets/dcat/sass/components/_dropdown.scss

@@ -4,6 +4,7 @@
     border: 0;
     min-width: 10rem;
     transform: none;
+    z-index: 20;
 
     .dropdown-item:hover {
       background-color: $dark30;

resources/assets/dcat/sass/components/_form.scss

@@ -203,7 +203,7 @@ select.form-control:not([multiple=multiple]) {
 }
 
 .select2-container--default .select2-selection--single .select2-selection__rendered {
-  line-height: 28px!important;
+  line-height: 31px!important;
 }
 
 .input-group-sm {