Function azul_core::app_resources::scan_ui_description_for_font_keys

pub fn scan_ui_description_for_font_keys(
    app_resources: &AppResources, 
    display_list: &DisplayList, 
    node_data: &NodeDataContainer<NodeData>
) -> FastHashMap<ImmediateFontId, FastHashSet<Au>>

Scans the display list for all font IDs + their font size