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!
New features
It’s now possible to log time directly from the Worklogs table
It’s now possible to add individual Holidays in Worklogs Configuration
Improvements
When a new Worklogs gadget is added it’s opened on the settings page
New categorization option: Project Category
Fixed Bugs
In some cases when Epic where now displayed