Feature Request: 1$$ should be useable in combinatorial mode

[u2arejust2cute]

This is a use case I would like to see added. ATM, 1$$ (choosing one at random) does nothing in combinatorial mode. It would be great to be able to use this just like in regular mode meaning that one of the following will be picked, excluding this bracket from the combinatorial script.

I sometimes have prompts in which I want to prompt for all characters, but I don't need for example all the poses. So doing all characters {c1|c2|c3} and then combining them with one of the poses {1$$ p1|p2|p3|p4...} would save time, since I don't need all the different poses, I just want a fixed pose from a selection. Currently combi mode does not seem to be able to provide this, so using this 'dead' specifier in combi mode like this would be nice.