Task: rename and refactor TimePage

As we know, we have options that do not depend on the time. Suggest to rename the page (and code-behind) to `AutoSwitchPage`.

I also want to change the UI to use **SettingsExpander** controls with the **ToggleSwitch** as the main settings (i.e. the **Header**) and the rest below that. _Visibility_ must be be set on each **SettingsCard**.

Also, the **ViewModel** (file) is absolutely huge and a big mess. It needs to be split in a few "partial" files and be properly sorted out. It's a wonder it works as well as it does now.

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Optional: Some of the RadioButton controls are optional - they depend on hardware. Best practice is to HIDE impossible settings, but the **RadioButtons** (container) control preserves space if a RadioButton has `Visibility=Collapsed`. Solution is to use ``, where items may or may not be _added_, but that means a large refactor.