Vertical separators in menu?

Hi, all - I hope this is the right place to post this. My question actually concerns Free Launch Bar, but would probably apply to True Launch Bar as well.

I have set up a small icon-based menu that works from the Quick Launch Bar area at the bottom of the screen, with five icons in it, like this:
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I don't want the menu to have two rows, though. What I really want is this:
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But no matter how I drag the separator around, it refuses to become vertical or stay where I put it.

I have the menu defined for 5 columns, which ought to be sufficient. Is there a way to do what I want within FLB? If not, please consider this a feature request...

Hmm.. currently this is impossible but I like the idea.

With TLB you can make this by using the spacer plugin.