igGrid filtering buttons aria role

by georgianastasov

HTML

<script src="https://igniteui.com/js/modernizr.min.js"></script>
<script src="https://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="https://code.jquery.com/ui/1.10.3/jquery-ui.min.js"></script>
<script src="https://cdn-na.infragistics.com/igniteui/latest/js/infragistics.core.js"></script>
<script src="https://cdn-na.infragistics.com/igniteui/latest/js/infragistics.lob.js"></script>
<script src="https://igniteui.com/js-data/employee-data-allDatatypes"></script>
<link href="https://cdn-na.infragistics.com/igniteui/latest/css/themes/infragistics/infragistics.theme.css" rel="stylesheet"></link>
<link href="https://cdn-na.infragistics.com/igniteui/latest/css/structure/infragistics.css" rel="stylesheet"></link>

<table id="grid"></table>

JavaScript

$(function () {
			var f = true, ds, schema;

			schema = new $.ig.DataSchema("array", {
				fields: [
					{ name: "FirstName", type: "string" },
					{ name: "LastName", type: "string" },
					{
						name: "RegistererDate", type: "date", formatter: function (value, record) {
							return value.toLocaleDateString();
						}
					},
					{ name: "Country", type: "string" },
					{ name: "Age", type: "number" },
                    { name: "IsActive", type: "bool" },
                    { name: "RegistererTime" }
				],
			});
      
			ds = new $.ig.DataSource({
				dataSource: employees,
				schema: schema,
				filtering: {
					type: "local"
				}
			}).dataBind();
      
			$("#grid").igGrid({
            autoGenerateColumns: false,
            height: "500px",
            width: "100%",
						columns: [
                    { headerText: "First Name", key: "FirstName", dataType: "string" },
                    { headerText: "Last Name", key: "LastName", dataType: "string" },
                    { headerText: "Register Date", key: "RegistererDate", dataType: "date" },
                    { headerText: "Country", key: "Country", dataType: "string" },
                    { headerText: "Age", key: "Age", dataType: "number" },
                    { headerText: "Is Active", key: "IsActive", dataType: "bool" },
						],
						dataSource: ds.dataView(),
						responseDataKey: "results",
						features: [
            	{
								name: "Filtering",
								type: "local",
								mode: "simple",
                filterDialogContainment: "window",
              },
            	{
                  name: "Paging",
                  type: "local",
                  pageSize: 10
              }
]
          });
          
          //set each filtering button aria role to 'button'
          $("#grid_dd_FirstName_button").attr("aria-role", "button");
          $("#grid_dd_LastName_button").attr("aria-role", "button");
         ...