Shortcuts for Find Next and Find Previous do not work

Each time I want to use Find Next (⌘G, cmd+g) or Find Previous (⇧⌘G, shift+cmd+g) it doesn't work and I have to manually click "next" or "previous" in the search bar.

Jump to Selection, however, works fine as a keyboard shortcut.

Start by tracing the keyboard shortcut handling for Find Next (⌘G) and Find Previous (⇧⌘G), then compare it with the working Jump to Selection shortcut. Done means both shortcuts trigger the corresponding search-bar actions instead of requiring manual clicks.

Written by the indexing model from the issue text.