fix(selection.js): enableFullRowSelection allows enableRowHeaderSelection.

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

fix #5474

Author: Portugal, Marcelo

src/features/selection/js/selection.js

@@ -942,7 +942,7 @@
             };
 
             function registerRowSelectionEvents() {
-              if ($scope.grid.options.enableRowSelection && $scope.grid.options.enableFullRowSelection) {
+              if ($scope.grid.options.enableRowSelection && $scope.grid.options.enableFullRowSelection && !$elm.hasClass('ui-grid-row-header-cell')) {
                 $elm.addClass('ui-grid-disable-selection');
                 $elm.on('touchstart', touchStart);
                 $elm.on('touchend', touchEnd);