[Proposal]: if ui_password is present, display the logout button if it isn't present don't display the logout button

It could be cool, so if you have the option `ui_password` then it could be like you have the UiPassword plugin activated and if it isn't present, then it could be like it is desactivated

Start by locating the ui_password option, the UiPassword plugin, and the logout-button UI entry point. Check how the UI determines whether password protection is enabled; done means the logout button is shown only when ui_password is present, with both configurations covered.

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