Here you need to make a "trick"...
To get the layout without that hidden components consuming space, you would need "manually" to hid them in the editor (just use the hide property and write there a "true"). After that you can organize them vertically, pretty much on the same height. By this - if they later become visible - they will then take the space - but not as long as hidden.
It is a bit tricky to edit like this - but possible.