Since all the auth logic is not ported to React on the web,
`_isWaitingForOwner` will always return `false` because the
`waitForOwner()` action is not (yet) used there.

THis fix always tries to hide the dialog no matter what, which is not a
Bad Thing to do anyway.

There is a related bug remaining, however: if one pressed "I am the
host" and then cancel, it doesn't goo back to the previous dialog, but
it completely kils the meeting. This is a compromise we'll have to live
with for a bit longer.

Fixes: https://github.com/jitsi/jitsi-meet/issues/11413
Fixes: https://github.com/jitsi/jitsi-meet/issues/11432