pub(crate) fn mount_frame_rate(world: &mut World, ui: Entity, rate: Entity)Expand description
Mount the frame-rate readout at the top of the window, centred.
An [egui::Area] rather than a window: it is pinned, not something the user
can drag away or accidentally resize, and interactable(false) keeps it
from swallowing a click meant for the scene underneath it.