fix(tree-base.js): Call updateRowHeaderWidth even when no data exists.
fix(tree-base.js): Call updateRowHeaderWidth even when no data exists.

Ensure row header visiblity is respected when no data is present.

fix #5430

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