added translation function calls to the added aria-labels

notebook/static/tree/js/notebooklist.js

@@ -235,7 +235,6 @@ define([
                 }
             });
 
-
             $('#button-select-all').click(function (e) {
                 // toggle checkbox if the click doesn't come from the checkbox already
                 if (!$(e.target).is('input[type=checkbox]')) {
@@ -815,14 +814,14 @@ define([
         //#issue 3961, update the checkbox aria-label when it changed
         if(selected.length>=1){
           if($('#select-all').prop("checked")){
-            $('#button-select-all').attr("aria-label","Selected All "+ selected.length+" items");
+            $('#button-select-all').attr("aria-label", i18n.msg._("Selected All "+ selected.length+" items"));
           }
           else{
-            $('#button-select-all').attr("aria-label","Selected, "+ selected.length+" items");
+            $('#button-select-all').attr("aria-label", i18n.msg._("Selected, "+ selected.length+" items"));
           }
         }
         else{
-          $('#button-select-all').attr("aria-label","Select All/None");
+          $('#button-select-all').attr("aria-label", i18n.msg._("Select All/None"));
         }
 
         // If at aleast on item is selected, hide the selection instructions.