Allow for using numeric & arrow keys to adjust amount when splitting a stack of materials

When you go to split a stack of materials you're currently given a slider to adjust the amount you want to move from the stack. What I'd like to see is that when on that screen you can use the numeric and arrow keys to adjust the amount more easily without having to rely on sliding the slider using mouse which lacks finesse when you want to pull out exact amounts quickly and efficiently.

So for example, if you have a stack of 39 and want to only take out 6 if you hit the Up Arrow + 6 key it would automatically adjust the slider increasing the amount by 6. If you hold the Down Arrow + 6 key it would reduce the amount by 6, and so on. Just pressing the Up or Down arrow could adjust the amount slowly then faster the longer you hold it, and on controller it could work the same way with d-pad or holding up/down on a thumb stick.