Ability to sort epics on the gantt chart by something other than the four default options - specifically standard & custom fields

It would be beneficial to be able to sort the epics gantt chart by something other than the four default options. Specifically, a standard or custom field (and, ideally, also by the epic 'rank').

This will help:

1. Ensure dates align with how things have been prioritized on the Features > Board

2. If the above is not true, be able to drag and drop things to quickly realign

3. Quickly set dependencies across records