Paid Memberships Pro - Nav Menus 0.4

* ENHANCEMENT: Added support for Multiple Memberships Per User. Use the filter `pmpronm_prioritize_levels` (array of level ID's) to give priority to a specific membership level. (@dparker1005)
* ENHANCEMENT: Added localization support. (@femiyb, @andrewlimaza)
* ENHANCEMENT/BUG FIX: Improved functionality for the new Block Editor for widgets (@andrewlimaza)
* BUG FIX: Fixed a fatal error when Paid Memberships Pro was deactivated. (@dparker1005)
* BUG FIX: Loaded Nav Menu functionality later than default but sooner than most other themes and plugins to help improve compatibility. (@JarrydLong)

* BUG FIX: Fixed issue where logged-in non-members would not see correct menu
* ENHANCEMENT: Added pmpronm_prioritize_levels filter for MMPU compatibility

* BUG FIX: Now shows correct menu for non-member users.