grepper prompt can't display <c-d> / <c-s> indicators at the same time

in the grepper prompt, pressing `` displays `[dir -file]` but if I press ``, it gets replaced by `[-side]`. I think it should be `[dir -file, -side]` ?

Start at the grepper prompt entry point and reproduce the behavior by pressing and then . Trace how each indicator is stored or rendered, and verify that the completed prompt displays both [dir -file] and [-side] together without one replacing the other.

Written by the indexing model from the issue text.