The pager in the GridView mode of FileExplorer is built-in the Grid control, while the one in the ListView is additionally added Slider control, so it does not provide all the functionality which come with the Grid.
What I could suggest you is to save the current page in a hidden field (you can do it on your custom context menu item's Client-Click handler) and to set it as a value to the Slider when the ImageEditor is closed. In order to access the current value of the Slider, you can use the method provided in my previous reply:
oExplorer = $find(
"<%= RadFileExplorer1.ClientID %>"
slider = $find(oExplorer.get_id() +
pageIndex = slider.get_value();
and respectively to set the desired value in a similar manner:
//sets the page index
I hope this approach will be suitable for your scenario.
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