When you add an object to a container, it moves the objects below in the container to make room for the new one. But should you reposition the object, the gap created remains.
Having a right-click option to consolidate the contents of a container would be awesome, in one click everything would be neatly rearranged up, or left, or right, and so on.
Obviously it could have some slight mishaps because we cannot read minds when developing code, but that would give us an option to alleviate some tediousness
Best,
Shades