stock movement : simply show exception error on page

stock/static/js/stock_movements.js

@@ -718,19 +718,15 @@ function do_stock_movement() {
                 closeModal();
                 reset_focus();
 
-                let could_not_reserve_error = "Failed api execute : <Fault 2: \"Could not reserve all requested products. Please use the 'Mark as Todo' button to handle the reservation manually.\">";
-                if(data.responseJSON.errors.length > 0
-                    && data.responseJSON.errors[0] == could_not_reserve_error) {
-                    $.notify("Erreur lors de l'opération : échec de la réservation d'un produit.", {
-                        globalPosition:"top right",
-                        className: "error"
-                    });
-                } else {
-                    $.notify("Erreur lors de l'opération.", {
+                let error_text_displayed = "Erreur lors de l'opération";
+                if(data.responseJSON.errors.length > 0) {
+                    error_text_displayed += " : " + data.responseJSON.errors[0]
+                }
+                error_text_displayed += ".";
+                $.notify(error_text_displayed, {
                         globalPosition:"top right",
                         className: "error"
-                    });
-                }
+                });
             }
         });
     }