Collection widget top and bottom margins

Hello,

I have a collection widget with a few mashups in it;

But as you can see, for whatever reason the mashups start in the middle of the container.

If I use the advanced size settings;

And set the growth ratio to 0, the collection widget itself disappears.

Is it even possible to have it start in the top left corner?

I assume it might be possible using CSS, but I would rather avoid using it.

Thanks,

Jens