As title says, if I'm short on crew ctrl clicking down fill to what I need, then to max if I do it a second time. 500 crew all at once is too much. Another; ctrl click selling when your transaction is in the red should mass-sell that commodity until your transaction is no longer in the red (will leave you at 0 credits) and then until your transaction will cost you 0 credits, and THEN all of what you've got, if you have enough of x to do so (pertinent for trading excess supplies for equipment).
Also, "take all" should stop at your max capacity on first click, then send your fleet into the red on fuel capacity on second click, or at least allow us to ctrl-click an over-stocked commodity to get our fleets out of the red on capacity. Having to shift-click and specifically drag out the excess quantity, especially when looting in-system while full of fuel, gets tedious & is needlessly disastrous when doing so on limited supply and forgetting to space the extra #