fix error when selecting 'unmatched' while filter is active

src/ui/state.rs

@@ -53,7 +53,7 @@ impl<'a> MatchListState<'a> {
                     .iter()
                     .filter(|log_match| log_match.matches(app, &self.filter))
                     .nth(selected - 1)
-                    .expect("filtered select out of bounds")
+                    .unwrap_or(&app.unmatched)
             }
         } else {
             &app.unmatched