Here is an example of the empty space: The solution I came up with is based on using the separator function combined with some minimal CSS styling.
It can look something like this: In this example, I am using only 1 column in the form designer. The separators will behave like columns when we set separator width and float in the CSS. Here are all the settings and CSS styles used for each separator: At the moment, I cant come up with a more efficient way to circumvent the issue. I am thinking that the separator lines and labels could probably be removed with CSS as well, but I think the default setting looks pretty neat
