Fixed bug, that broke UUID changer when user provides spaces in UUID.

Backend/mocked-services/src/main/resources/static/js/datatransfer.js

@@ -280,9 +280,10 @@ async function fetchUUIDCheck(givenUUID , strategy){
 }
 
 function checkUUIDChars(uuid) {
+    uuid.replace(/ /g,'')
     console.log("UUID in check: " + uuid);
     const regex = new RegExp("^[A-z0-9-]+$");
-    if(regex.test(uuid)){
+    if(regex.test(uuid) || uuid == ""){
         return uuid ;
     } 
     return "invalid";