It would be awesome if the duration of the Pocket Dimension countdown timer was alterable in tweakDB. That way I could reduce it slightly to make things like selling treasure off to Brax less cumbersome.
This has gameplay implications elsewhere though (though how significant that is in a modded, single player only game is another matter). What about having the shift-click quick sell state follow you into the PD instead? This would probably suit the stated goal even better.