Suggestion: Let us add ammo to our backpack from the magazine selection menu

This game is amazing, but after 30 hours in the playtest this is my biggest complaint so far (which says a lot about how good the game is!) I have to navigate to an entirely different tab to add loose ammo to my bag when I should just be able to do it from here.

EDIT: Looks like you can do this by CTRL clicking the ammo box to the right of the magazines that's being partially covered by the UI. I'm leaving the post up just so others like myself can realize this is already a feature.