selected = "selected" to better fit the xml
fixed undefined variable $is_display for method  _getCheckBoxesForMultipleRowOperations
correct test for getCheckBoxesForMultipleRowOperations
correct test for getCheckBoxesForMultipleRowOperations / part 2
Merge pull request #143 from Gemorroj/master

fixed undefined variable $is_display for method _getCheckBoxesForMultipleRowOperations