no example of json using the names property as slice index

[ntraut]

What is the current behaviour?

currently slices index could be array indices or strings specified in the json, but there is no json example using the second possibility

microdraw/app/public/js/microdraw.js

Lines 2043 to 2045 in 10ccb64

	for( let i = 0; i < obj.tileSources.length; i += 1 ) {
	// name is either the index of the tileSource or a named specified in the json file
	const name = ((obj.names && obj.names[i]) ? String(obj.names[i]) : String(i));

What is the expected or desired behavior?

include an example of json using custom names for slices

[ntraut]

at least we need some examples where Microdraw.ImageOrder is not just the indices of the slice array from 0 to the slices number because microdraw is probably broken in this case