add shortcut str+alt for studentlist, add css for studentNames scrollable

public/css/Studentenverwaltung.css

@@ -96,6 +96,13 @@ html.fs_huge {
 	overflow: visible !important;
 }
 
+/* to enable scrolling for many student entries*/
+.stv-details-abschlusspruefung-student-names {
+	max-height: 80px;
+	overflow-y: auto;
+	overflow-x: hidden;
+}
+
 .p-dropdown-item{
 	z-index: 1201 !important;
 }

public/js/components/Stv/Studentenverwaltung/List.js

@@ -514,6 +514,14 @@ export default {
 			this.$reloadList();
 		},
 		onKeydown(e) { // TODO(chris): this should be in the filter component
+
+			if ((e.ctrlKey || e.metaKey) && e.code === "KeyA") {
+				e.preventDefault();
+
+				this.$refs.table.tabulator.deselectRow();
+				this.$refs.table.tabulator.selectRow();
+			}
+
 			if (!this.focusObj)
 				return;