message: Fix error handling in storage class creation
diff: @@ -521,7 +521,9 @@ export class StorageClassForm_ extends React.Component<StorageClassFormProps, St
  runValidation ? this.setState({newStorageClass: newParams}, this.validateForm) : this.setState({newStorageClass: newParams});
  };
  - createStorageClass = () => {
  + createStorageClass = (e: React.FormEvent<EventTarget>) => {
  + e.preventDefault();
  +
  this.setState({
  loading: true,
  });
  @@ -836,7 +838,7 @@ export class StorageClassForm_ extends React.Component<StorageClassFormProps, St
  className="btn btn-primary"
  id="save-changes"
  disabled={!this.state.validationSuccessful}
  - onClick={() => this.createStorageClass()}>
  + onClick={this.createStorageClass}>
  Create
  </button>
  <button
  