let highlight affect stash, inventory, store AND gemcutting at the same time

Reason: If the player wants to highlight things with certain specifications, He most likely wants to have it highlighted everywhere (I sure do). That's even more the case if he's using the highlight to look for an specific thing (like a gem, or any and everything that may affect AoE or damage) that he's not sure if it is in the stash or in his inventory.

I would go as far as to suggest that the highlight input be detached from specific windows and actually popup in the bottom center of the screen whenever stash, inventory, store, or gemcutting windows are open.