 
         if (nameColumn)
         {
- 	        nameColumn.headerText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_nameColumnHeader");
-	        measuredText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_nameColumnMeasuredText");
-	        nameColumn.width = determineWidthToDisplay(measuredText);
+            nameColumn.headerText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_nameColumnHeader");
+            measuredText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_nameColumnMeasuredText");
+            nameColumn.width = determineWidthToDisplay(measuredText);
         }
 
         if (typeColumn)
         {
-	        typeColumn.headerText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_typeColumnHeader");
-	        measuredText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_typeColumnMeasuredText");
-	        typeColumn.width = determineWidthToDisplay(measuredText);
+            typeColumn.headerText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_typeColumnHeader");
+            measuredText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_typeColumnMeasuredText");
+            typeColumn.width = determineWidthToDisplay(measuredText);
         }
 
         if (sizeColumn)
         {
-	        sizeColumn.headerText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_sizeColumnHeader");
-	        measuredText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_sizeColumnMeasuredText");
-	        sizeColumn.width = determineWidthToDisplay(measuredText);
+            sizeColumn.headerText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_sizeColumnHeader");
+            measuredText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_sizeColumnMeasuredText");
+            sizeColumn.width = determineWidthToDisplay(measuredText);
         }
 
         if (creationDateColumn)
         {
-	        creationDateColumn.headerText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_creationDateColumnHeader");
-	        measuredText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_creationDateColumnMeasuredText");
-	        creationDateColumn.width = determineWidthToDisplay(measuredText);
+            creationDateColumn.headerText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_creationDateColumnHeader");
+            measuredText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_creationDateColumnMeasuredText");
+            creationDateColumn.width = determineWidthToDisplay(measuredText);
         }
 
         if (modificationDateColumn)
         {
-	        modificationDateColumn.headerText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_modificationDateColumnHeader");
-	        measuredText = resourceManager.getString(
-	        	"aircontrols", "fileSystemDataGrid_modificationDateColumnMeasuredText");
-	        modificationDateColumn.width = determineWidthToDisplay(measuredText);
-        }
-
-		dateFormatString = dateFormatStringOverride;
-
-		invalidateList();
-		invalidateSize();
+            modificationDateColumn.headerText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_modificationDateColumnHeader");
+            measuredText = resourceManager.getString(
+                "aircontrols", "fileSystemDataGrid_modificationDateColumnMeasuredText");
+            modificationDateColumn.width = determineWidthToDisplay(measuredText);
+        }
+
+        dateFormatString = dateFormatStringOverride;
+
+        invalidateList();
+        invalidateSize();
     }
 
     /**

        if (item.isDirectory)
        {
            return resourceManager.getString(
            	"aircontrols", "fileSystemDataGrid_typeFolder");
        }

        // If item is a file without an extension, return "File".

     *     itemClick="fileSystemViewer.navigateBack(event.index);"/&gt;</pre>
     *
     *  @default []
     *
     *  @see #canNavigateBack
     *  @see #navigateBack()
     *  @see mx.controls.FileSystemHistoryButton
     */
    public function get backHistory():Array
    {
