Suggestion to improve split mechanic

[Heorot 1]

I'd like the option to right klick an item and as I move the cursor to the side while still holding right mouse button I get an text option that I can release the button on and have a text field where I can write the amount I want to deattach from the stack that I had the cursor over. Perhaps other text options could also be implemented with stack splitting or even other favorite fast options that are available in the existing menues or new options. Also open for more ideas!