So, I had a medkit in my inventory and I wanted to clean unnecessary items from it (blood type test kit etc.). I right click on medkit, click "show contents". However, at this point, the "ground" inventory gets occupied by Medkit's inventory so I can not drag items from Medkit to ground. As dragging items outside of inventory also does not work in newui, I either have to:

a) drag the unnecessary items from medkit to my own clothes' empty slots and then close the medkit and drag those items to ground

b) If my inventory is also full, I have to drag unnecessary items from medkit to my hands, and then drop it from my hands to make it fall to the ground one by one.

I hope I could explain the problem clearly. {F33020}