The dashboard gadgets are not respecting JIRA's ISO8601 setting

Issue Summary

The dashboard gadgets like Recently Created Chart, Time Since Chart, are not respecting JIRA's ISO8601 setting

Steps to Reproduce

1. 1. Navigate to Jira System > Look and Feel
   2. Enable the "Use ISO8601 standard in Date Picker"
   3. Navigate to Dashboard and add a Gadget: for example "Recently Created Chart"
   4. Customize the gadget and set it on a weekly basis

Expected Results

The week number goes according to the ISO8601 standard.

Actual Results

The charts show the US-calendar week with the start of the week as a Sunday

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available