ios navigate on click.

Regex replacement as written will mangle URLs. It should be something like:

( Dude, you do not need delimiters in character classes: [&?] not [&,?]! )

```
replace(/([&?])embed(?=[^&]*)(\&|$)/g, function (match, before, after) {
  if(after == '') return '';
  else return before;
});
```

To correctly handle the following:

- `/room?embed=blah&p=q` to `/room?p=q`
- `/room?p=q&embed=blah` to `/room?p=q`
- `/room?p=q&embed=blah&r=s` to `/room?p=q&r=s`
- `/room?p=q&embed&r=s` to `/room?p=q&r=s`
- `/room?p=q&embed=&r=s` to `/room?p=q&r=s`
- '/room?p=q&r=s` unchanged
- '/room?p=q&embeddability=foo&r=s` unchanged

Please test the regex!