GravityView 2.39.1

* Improved: Previous fix for an issue that affected HTML rendering of some posts and pages

* Fixed: Issue introduced in Version 2.10.2 that affected HTML rendering of some posts and pages
* Fixed: Undefined function error for sites running WordPress 4.x introduced in Version 2.10.2

* Fixed: Using the GravityView shortcode inside a [reusable block](https://wordpress.org/news/2021/02/gutenberg-tutorial-reusable-blocks/) in the WordPress Editor would prevent CSS and JavaScript from loading
* Fixed: "Open in new tab/window" checkbox is missing from Link to Single Entry and Link to Edit Entry links
* Fixed: Searching while on a paginated search result fails; it shows no entries because the page number isn't removed
* Fixed: Sorting by Entry ID resulted in a MySQL error