BUG FIX/ENHANCEMENT: Better profile page checks prevent issues with rewrite rules.
* BUG FIX: Fixed issue when profile page was nested within a nested page (Thanks @JarrydLong)
* BUG FIX: Fixed fatal error when Paid Memberships Pro plugin wasn't active. (Thanks @JarrydLong)
* BUG FIX: Fixed a layout issue conflict on the directory page for the Membership Maps Add On being included in the div container and now displays it correctly. (Thanks @JarrydLong)
* BUG FIX: Fixed warnings of undefined variables when navigating to a profile page of a non-existing user. (Thanks @ipokkel)
* REFACTOR: Adjusted incorrect docblock variable for the format the profile field method. (Thanks @ipokkel)
* ENHANCEMENT: Added small sanitization check for query parameter values.
* BUG FIX: Fixed issue where passing "user_id" attribute in shortcode was returning empty results.
* BUG FIX: Removed debug code that was causing minor output issues.