Why does the server action panel split into two colums when widening?

When I want to widen the server action panel at some point it breaks into two columns with the actions on the left and the steps on the right. This is annoying as when it happens I have to then widen the steps which is always what I’m trying to widen in the first place. It causes me a lot of grrrrr moments.

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Also, can I make the side panels smaller? If I have both right and left panels open on my laptop the middle code/design section is tiny. I know I can collapse the side panels, but I would much rather have control to size those. This image shows the side panels as small as I seem to be able to make them.

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Thanks.