Make login action more easy to discover

When the desktop client is logged out from the server, the only way to log in again is via the menu related to the account accessible from the main dialog.
This is not necessarily easy to discover even though this action is critical to get the desktop client to work successfully again.
We may need to show it more prominently.
For example settings dialog has no way to access it even though we show the account has being disconnected.
For example the action may be shown directly without having to go through a menu when we are logged out.