Sort chromosome names in VCF tab of Dataset Explorer

[Don-Isdale]

This sub-issue is part of #431.

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Introduction

Chromosome names are sorted in the 'All Datasets' tab of Dataset Explorer.
This was also true in the other tabs, but it looks like the framework upgrade #370 has impacted that functionality.
Sorting Chromosome names makes it easier and quicker for users to find and view the chromosomes they are interested in.
This issue will track changes to re-establish sorting of chromosome names in the VCF tab and other tabs.

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[Don-Isdale]

Changes implemented

0584003 Sort chromosome names in remaining Dataset Explorer tabs

Test before the change, showing the issue

Result of testing the change on local