add instrument arg instead of empty args

webserver.py

@@ -431,7 +431,7 @@ a {
             label = " ".join(devices)
             if remote:
                 prev.legend = '<td></td><td></td><td colspan=2>linse-c*: <i>history graphics only</i></td>'
-                out.append(f'<tr><td><a href="{remote}">{ins.upper()}</a></td>'
+                out.append(f'<tr><td><a href="{remote}?instrument={ins}">{ins.upper()}</a></td>'
                            f'<td>{label}</td><td>{link("linse-c*")}</td>')
             else:
                 out.append(f'<tr><td>{link(left)}</td><td colspan=2>{label}</td>')