[Feature Request] Add settings option for default sort

[mzac]

What would you like to add or change?:
Most of my queries in NtopNG are to look for the top flows, top traffic, etc. However by default when sorting columns it always sorts from the smallest integer to the largest. Could this default behavious either be changed or added as a setting that the user could choose to sort by default small -> large or large -> small?

Why do you and others need this?:
It would save time when we have a very big table from having to sort the data twice.