Fix email auth freeze

[tonisevener]

Phabricator: https://phabricator.wikimedia.org/T422086

Notes

We had another toast freeze when failing to enter the incorrect email auth code. I think this is a similar bug as #5746, mainly that our toasts freeze up when displayed or presented at the same time as the keyboard focus state. I am now adding a couple of modifiers to our toasts view.:

.focusable(false)
.focusEffectDisabled(true)

That does seem to fix this bug, so hopefully it will also fix it in other contexts we may not have found yet.

Test Steps

1. Enable email auth code toggle in dev settings
2. Log into account with email associated
3. In email auth popup, enter an incorrect code.
4. App should not freeze, you should see error message toast on top of keyboard.
5. Ensure I didn't accidentally bring back create reading list bugs (https://phabricator.wikimedia.org/T421012).

Screenshots/Videos