Provide a few internals for scripting.

backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/JintScriptEngine.cs

@@ -224,17 +224,13 @@ namespace Squidex.Domain.Apps.Core.Scripting
             {
                 throw new ValidationException(T.Get("common.jsError", new { message = ex.Message }));
             }
-            catch (OperationCanceledException)
-            {
-                throw new ValidationException(T.Get("common.jsError", new { message = "Timeout" }));
-            }
             catch (DomainException)
             {
                 throw;
             }
-            catch
+            catch (Exception ex)
             {
-                throw new ValidationException(T.Get("common.jsError", new { message = "RuntimeError" }));
+                throw new ValidationException(T.Get("common.jsError", new { message = ex.ToString() }));
             }
         }
     }