GamiPress - Leaderboards 1.4.8

* **Bug Fixes**
* Fixed position shortcode for paginated leaderboards with disabled cache.

* **New Features**
* Hide Users Without Earnings.
* Added the field "Hide Users Without Earnings" to the leaderboard edit screen.
* Added the attribute "hide_no_earners" to the [gamipress_leaderboard] shortcode.
* Added the field "Hide Users Without Earnings" to the GamiPress: Leaderboard widget.
* **Improvements**
* Improve database query performance based in GamiPress 6.9.4 changes.

* Fixed visibility for the boxes located at the leaderboard edit screen.