Function focusable_block 

pub fn focusable_block(
    title: &str,
    shortcut: Option<u8>,
    focused: bool,
    theme: &Theme,
) -> Block<'static>

Convenience wrapper: builds a widget_title and a panel_block in one call.

Use this for any widget that is focusable and optionally has a digit shortcut. The border color and the digit indicator always stay in sync.

let block = focusable_block("Status Log", Some(2), focused, &theme);