Fix iframe reloadEditor no-op once fragment is on the URL (#11184)

This only applies in the iframe / no-cookie case as otherwise reload was
already called.

After one reloadEditor adds #editor, navigating to the same URL via
location.assign(location.toString) doesn't actually reload as it's counted as a
fragment navigation only. So it worked the first time only (e.g. when toggling
keyboard controls you can only toggle once).

This isn't an issue for micro:bit apps embedding MakeCode as they're same-site
and go down the path that already reloaded, but confused me a lot when testing
the iframe embedding in a non-same-site context.

Co-authored-by: Richard Knoll <riknoll@users.noreply.github.com>

Author: microbit-matt-hillsdon

webapp/src/app.tsx

@@ -2981,10 +2981,11 @@ export class ProjectView
                     if (hc) params.set("hc", "1");
                     else params.delete("hc");
                 }
+                // Need to add the URL parameters to the URL for the reload.
+                // Assigning to search will navigate on the first call but reload() needed
+                // for subsequent calls if there's a fragment (e.g. #editor).
                 location.search = params.toString();
-                // .reload refreshes without hitting server so it loses the params,
-                // so have to navigate directly
-                location.assign(location.toString());
+                location.reload();
             } else {
                 location.reload();
             }