While poking at bug 139884 and trying to search for Default Character Style the default search for 'All Commands' does not include controls from the Styles or the Macros categories in its search results.
Seems like it ought to.
Stumbled over this problem myself. Search itself works but only when you switch to Styles. We either have to move the superior categorization of command, macro, style into another selection (this breaks the design). Or include those items in All Commands to make them appear on search.
Let's bring up these commands too if search matches it. But keep the structure and have it separately from All Commands.