Need to check microphone permissions on page load

[dhdaines]

If ever you deny microphone permissions to a page, the browser (any sensibly secure one) will never ask you again, which means that recording will always fail with permission denied.

We need to detect this situation and warn the user right away, that they will need to grant permissions and reload the page.

We also need to delay the "recording" indicator until the microphone actually record when the browser asks for permission.

[joanise]

Delaying the recording indicator is done (#154)

Is detecting the permission issue done yet?

[dhdaines]

It will put up a toast with the error it gets from the browser, e.g.:

[dhdaines]

so, we could probably improve that error message :)

[joanise]

Well, OK, we could polish the message, but this issue is still addressed at least. I guess I'll leave it open in case we want to review the error message before closing.