How to disable/change date range for Plot.ly GANTT date quick slectors?

We are rendering a GANTT chart with figure_factory. The GANTT has some buttons along the top to quick-toggle date ranges:
Screenshot_20180928_211907

How can we:

  • disable the quick date toggles, and/or
  • select specific date interval buttons to be more relevant to our data (such as 1d, 1w)?