Good news! Worklogs - Time Tracking and Reports team have just released a new version, and since you use Jira Server you can decide to upgrade at any time! All that is needed is a click of a button in the Apps management screen on your instance!
Improvements
Added new Time range shortcut -- Quarters
Option to remove non-working days and displaying only the working days
Fixed Bugs
The story points estimate field isn't working – FIXED
Broken cycling through weeks in gadget – FIXED