Fix non localized string in the Grid Export client events sample.

Author: skrustev

HTMLSamples/grid/export-client-events.html

@@ -125,7 +125,7 @@
             exportingOverlay.css({
                 "width": $gridContainer.outerWidth(),
                 "height": $gridContainer.outerHeight()
-            }).html('<span class="exporting-text">Exporting...</span>');
+            }).html('<span class="exporting-text">$$(Exporting)</span>');
             exportingOverlay.addClass("exporting-overlay");
 
             $gridContainer.append(exportingOverlay);