fix(location): a POI key held with Cmd, Ctrl or Alt runs no POI

The points-of-interest keys (Q/W/E/R/T while a city is expanded) are a
second bare-key document listener, and it did not look at modifiers
either: Alt+R or a delivered Ctrl+R picked the fourth POI and flew the
camera there. It now leaves Cmd, Ctrl and Alt chords to the browser like
the application shortcuts; Shift still counts as the key. The docs and
the changelog entry say so.

docs/CURRENT-STATE.md

@@ -2329,6 +2329,8 @@ typing and Escape behavior retain their existing mappings. A shortcut key held
 with Cmd, Ctrl or Alt runs no shortcut, so the browser's own chord (Cmd+C to
 copy, Cmd+F to find, Cmd+1 to switch tab) does not also toggle CCTV, the layers
 panel or a style; Shift does not count, and Escape dismisses search either way.
+The Q/W/E/R/T keys of an expanded city's points of interest follow the same
+rule.
 Capture-phase surfaces continue to arbitrate their own keyboard events first.
 
 The UI facade retains shader values, share-restore authority, render requests,