Modified sorting logic to sort no-node reads

[shreyasun]

Fixes #431

[adamnovak]

I think some of the code was reordered to add the comments and now it doesn't actually work. Also the comparison function's comment about what it does needs updating. I made some suggestions.

[adamnovak]

The tests are failing because the reads are not defined early enough.

Suggested change

	function compareNoNodeReads(a, b) {
	// Sort by order by segments
	const segmentA = readA.path[a.pathIndex];
	const segmentB = readB.path[b.pathIndex];
	if (segmentA.order !== segmentB.order) {
	return segmentA.order - segmentB.order;
	}
	// Sort by reads' source track
	const readA = reads[a.readIndex];
	const readB = reads[b.readIndex];
	if (readA.sourceTrackID !== readB.sourceTrackID){
	return readA.sourceTrackID - readB.sourceTrackID;
	}
	function compareNoNodeReads(a, b) {
	// Get the reads for the segments
	const readA = reads[a.readIndex];
	const readB = reads[b.readIndex];
	// Sort by order by segments
	const segmentA = readA.path[a.pathIndex];
	const segmentB = readB.path[b.pathIndex];
	if (segmentA.order !== segmentB.order) {
	return segmentA.order - segmentB.order;
	}
	// Sort by reads' source track
	if (readA.sourceTrackID !== readB.sourceTrackID){
	return readA.sourceTrackID - readB.sourceTrackID;
	}

[adamnovak]

I don't think we need this logging in the final version.

Suggested change

	console.log("elementsWithoutNode before sort:", elementsWithoutNode)
	elementsWithoutNode.sort(compareNoNodeReads);
	console.log("elementsWithoutNode:", elementsWithoutNode)
	elementsWithoutNode.sort(compareNoNodeReads);

[adamnovak]

This comment isn't true anymore and needs to be updated.

Suggested change

	// compare read segments which are outside of nodes
	// by the y-coord of where they are coming from
	// Compare read segments which are outside of nodes, to sort them in a good horizontal
	// and then vertical display order.