add demo url text parameter

qurator/sbb_ner/webapp/static/js/ner-demo.js

@@ -52,7 +52,7 @@ function update() {
     var model_id = $('#model').val();
     var input_text = $('#inputtext').val()
 
-    if (input_text.length < 200) {
+    if (input_text.length < 30000) {
 
         var url_params = new URLSearchParams(window.location.search);
 
@@ -60,6 +60,9 @@ function update() {
 
         window.history.replaceState({}, '', `${location.pathname}?${url_params}`);
     }
+    else {
+        window.history.replaceState({}, '', `${location.pathname}`);
+    }