Feature request: When I search for an operation, tell me what category it's in

**Is your feature request related to a problem? Please describe.**
When I search for an operation, I'd like to be able to click to find that operation in the future. But I'm stuck using the search bar repeatedly, because I don't know where to find the operation in the future.

**Describe the solution you'd like**
I'd like to see the category for each search result listed somewhere, e.g. in the popover that shows when you hover an operation.

**Describe alternatives you've considered**
- show the category in a faint font to the right of the op name
- or in small text under the op name

**Additional context**

Mockup of each suggestion:
1. 
2. 
3. 

Start by locating the frontend operation search results and the hover popover that displays an operation. Compare the three attached mockups and determine how the category should be presented. Done means each search result identifies its category in the chosen layout and remains usable for finding the operation later.

Written by the indexing model from the issue text.