Yes, 1 window with 2 tasks on both sides.
Thank you for your effort!
“Save to Batch” button is nice!
Please also revert the double-click (for single item) and “Edit” button (for multiple items). It’s necessary, since the window is 2-task. So the left board changes only when the user really wants to.
Batch dialogs are big enough for this button.
By the way, is “Close” button necessary (even for touch screens)?
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“Select from Batch List” menu is not really the solution for “Search Favorites”, right?
(If it is, I hope I can set to show/hide any item.)