message: change buttons to be only save and overwrite
diff: @@ -437,8 +437,8 @@ class DatasourceControl extends React.PureComponent {
  <SaveDatasetModal
  visible={showSaveDatasetModal}
  onHide={this.toggleSaveDatasetModal}
  - buttonTextOnSave={t('Save & Explore')}
  - buttonTextOnOverwrite={t('Overwrite & Explore')}
  + buttonTextOnSave={t('Save')}
  + buttonTextOnOverwrite={t('Overwrite')}
  modalDescription={t(
  'Save this query as a virtual dataset to continue exploring',
  )}
  