fix(selection.js): enableFullRowSelection allows enableRowHeaderSelection.
fix(selection.js): enableFullRowSelection allows enableRowHeaderSelection.

Ensured that the enableFullRowSelection no longer adds the disable selection class to row header
cells.

fix #5474

angular-ui/ng-grid,angular-ui/ui-grid,angular-ui/ng-grid,angular-ui/ng-grid,angular-ui/ui-grid,angular-ui/ui-grid