Jayden Seric 02e0b20210 Fixed name-spacing for SilverStripe v4 compatibility
Used [silverstripe-upgrader](https://github.com/silverstripe/silverstripe-upgrader) to fix name-spacing for SilverStripe v4. I then alphabetically sorted the use declarations for readability.

Fixes: https://github.com/silverstripe-australia/silverstripe-gridfieldextensions/issues/166.
2016-09-09 17:00:05 +10:00
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