How about a button that combines / splits the resources in the Star Menu?
Example:
you have 10 stacks of 350 Hardwood planks
in stead of having to open Star menu, click planks, click Mayor's house x 10
add a button that combines the 10 stacks in 1 stack of 3500, so you only have to click once..
(same goes for fish food / musk deer fragrance / perhaps even buff baskets so you can have like a 100 buffs in stead of only 25)
and/or perhaps one that works the other way, where you can break down stacks into smaller ones...