Option not to hide UI

### Problem I have

When I use Phanpy on mobile, I use the tab/menubar layout. Sometimes after I'm done scrolling through my timeline I want to take a look at notifications, but the tabs are hidden. I need to scroll up to make them reappear, which is a bit slow.

### Solution I'd like

I would like a setting so the UI always remain visible.

### Alternatives considered

_No response_

### Other

Thank you for your hard work on phanpy, it's a gorgeous client :)