Constant clipboard_x11::ffi::XCB_INPUT_FOCUS_POINTER_ROOT

pub const XCB_INPUT_FOCUS_POINTER_ROOT: u32 = 1; // 1u32

The focus reverts to XCB_POINTER_ROOT respectively. When the focus reverts, FocusIn and FocusOut events are generated, but the last-focus-change time is not changed.