LibreOffice Extensions and Templates Site: Fix For Listing Releases

The listing of LibreOffice extension and templates releases and linked releases had an issue. The newest final release was not shown to the user. This issue was caused from the custom URL for the releases. The new releases and linked releases get an URL that placed them at the top of a list, which lead in the reverse order to getting them to the bottom of the list.

I fixed this issue with a new sorting key. The releases are listed in reverse order by the date they were created. The current final release is choosen by its release date in reverse order.

I contributed this fix to the TDF Github repository and delivered it to the LibreOffice extensions and templates website today.