I wasn’t sure if it was a bug, but that window appears to be unique in that it relates to screen position, instead of EmEditor main window. From my perspective, there is some variation in where the dialog boxes appear and I couldn’t quite figure out the logic. Search and Define Encodings appear to remember relative position from the main window, while Customize and Input/Export appear to be main window center. I didn’t find any that operated like Quick Launch, but that’s not exactly definitive.
To answer your question, yes. More accurately, I think Quick Launch should operate the same way as other dialog boxes like the Search or Find in Files.
Thanks,
Paul