* Move call to `tryPersistStorage` to `OnLoggedIn` handler
I think this needs to happen whether or not we are in the middle of a login
flow.
Fixes: https://github.com/element-hq/element-web/issues/31298
* Inline `MatrixChat.onLoggedIn`
It's now a one-liner, and its semantics are very confusing.
* Factor out `MatrixChat.onLoggedIn`
Now that we've got rid of the confusing `onLoggedIn` method, we can factor out
a method which *actually* handles `OnLoggedIn` actions.
eeb2c0f690