Avoid doing this every frame when there have been no assets loaded.

[github-actions]

We should should be able to use the asset load progress event listener to detect newly loaded assets that will need to be handled.

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bones/framework_crates/bones_bevy_renderer/src/lib.rs

Lines 551 to 558 in b91e278

	.shared_resource_cell::<bones::EguiTextures>()
	.unwrap();
	// TODO: Avoid doing this every frame when there have been no assets loaded.
	// We should should be able to use the asset load progress event listener to detect newly
	// loaded assets that will need to be handled.
	let mut bones_egui_textures = bones_egui_textures_cell.borrow_mut();
	// Take all loaded image assets and conver them to external images that reference bevy handles
	bones_image_ids.load_bones_images(

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This issue was generated by todo-issue based on a TODO comment in b91e278.