throw javascript errors on >= 400 HTTP errors

js/stores/edition_list_store.js

@@ -13,7 +13,6 @@ class EditionListStore {
     }
 
     onUpdateEditionList({pieceId, editionListOfPiece, page, pageSize, orderBy, orderAsc, count, filterBy}) {
-        
         /*
             Basically there are two modes an edition list can be updated.
 

js/utils/requests.js

@@ -21,7 +21,7 @@ class Requests {
     }
 
     unpackResponse(response) {
-        if (response.status >= 500) {
+        if (response.status >= 400) {
             throw new Error(response.status + ' - ' + response.statusText + ' - on URL:' + response.url);
         }