Scroller in the exporter grid menu option not working

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• This is a bug report, not a question on how to use the grid.
  Use Stack Overflow or Gitter for questions.
• You have searched the open issues to see if this bug has been filed before. We don't want duplicate issues.
• You have reviewed the tutorials and documentation to ensure you are using the grid correctly. ui-grid.info
• You are using the latest version of the grid. Older versions are not patched or supported.
• You have provided steps to recreate your bug. A plunkr is even better.