Pickers: search in all columns simultaneously

I'd like to be able to search for a term in all columns, the way it worked before the new pickers were implemented.

Consider, for example: in the command palette, I want to search for the word search in the command names OR the docs.

Specifying each column individually (%n search %d search) gives you an AND, not an OR.
Even if it was an OR, if I'm trying a few different search terms, I'd have to rewrite that entire line with the new term every time.
E.g. %n search %d search -> %n find %d find.

I'm suggesting something like %* search to match on any column.
Also, this way you can quickly try different terms by hitting C-w: %* search -> %* find.

Start with the picker and command-palette search behavior described in this issue, comparing the current column-specific syntax with the earlier all-columns behavior. Verify the intended wildcard or OR semantics and the C-w editing flow, then add coverage for matching terms in command names or documentation across columns.