node free space table sorting does not respect units

[dekimsey]

General information

• OS Platform and Distribution (e.g., Linux Ubuntu 16.04): Linux
• ElasticHQ Version: 3.5.12
• Elasticsearch Version: 6.8
• Python version (ignore is using docker image):
• Browser Vendor and Version (if applicable): Firefox

Issue Description

The free space column in the Nodes list doesn't handle units correctly. The sorting is ... ineffective. I looked at adding the necessary ts configuration but I wasn't sure what direction it should be done (in the Javascript as a comparison function on table-sorter, or instead have the cat API to request raw numbers and make the ui add the units instead). Also, I'm not a react person, so there'd be a learning curve.

Source Code / Logs

Be Patient

I have a day job. ;-)