message: frontend: Fix deployment revision history modal
  Was send a string (with quote chars) to the API instead of an integer.
diff: @@ -28,7 +28,7 @@ class ConfigureRevisionHistoryLimitModal extends PromiseComponent {
  if (type === 'unlimited') {
  this.props.deployment.spec.revisionHistoryLimit = null;
  } else if (type === 'custom') {
  - this.props.deployment.spec.revisionHistoryLimit = event.target.elements['input-max-unavailable'].value;
  + this.props.deployment.spec.revisionHistoryLimit = _.toInteger(event.target.elements['input-max-unavailable'].value);
  }
  this.props.close();
  }
  