Pressing Cmd+Down or F4 in a focused revision diff did nothing when the working file was found after focus entered the pane: the keyboard dispatcher kept the navigator object registered before that lookup, while the diff replaced it. The diff now keeps the registered navigator and refreshes its handlers in place, so Jump to Source opens the working file at the mapped caret.
Co-authored-by: shohruh-genius <7658451+shohruh-genius@users.noreply.github.com>
