Reduce network requests on core/biblio

[saschanaz]

respec/src/core/biblio.js

Lines 150 to 156 in 103f318

	if (externalRefs.length) {
	// Going to the network for refs we don't have
	const data = await updateFromNetwork(externalRefs, { forceUpdate: true });
	Object.assign(biblio, data);
	}
	Object.assign(biblio, conf.localBiblio);
	await updateFromNetwork(neededRefs);

Those two serial requests are one of the major performance bottlenecks in #2187. Maybe we can merge them into one request, or at least we should make them parallel.

[saschanaz]

@marcoscaceres Any idea why we request twice here? (It's introduced by #1018.)