Adding to what was said, you can use the margin top property in the container. Setting it to 10px, for example.
There was an update to Silk Ui / Web Application some time ago that changed the behaviour of the div margins in the forms, causing now the divs (containers) to be put one below the other without having a space between them.
You can add your own css to create those spaces again, being much easier than setting the margin top of every container.
This, added to the theme css of the application (property style) will work:
.Form div { margin-top: 10px; }
The caveat is that EVERY div in the form will have a margin, now, including the divs that are inside the main divs.
You can change the margin top directly in the container properties or try to be more specific in the css selector, I'm on a mobile, so I can't check, but something like .Form > div may work. Really need to inspect to see.
Cheers
Eduardo Jauch