GravityView - Gravity Forms Calendar 2.8.3

* Fixed: Fatal error when trying to detect Gutenberg editor
* Fixed: Events without defined start/end time and spanning multiple days (e.g., September 28-30) would show as ending one day earlier
* Improved: Fully hiding Calendar feed options that should only be shown when a linked option is toggled

* Fixed: [GP Nested Forms](https://gravitywiz.com/documentation/gravity-forms-nested-forms/) compatibility issue

- Added: New Conditional Logic that lets you filter events using AND/OR operators
- Many more Conditional Logic filtering options are available!