The Events Calendar Pro 6.4.0

* Fix - When using "Once" recurring rule, events were not being updated correctly. Thanks to @lasandia, Cynthia Giles and others for flagging this! [110006]
* Fix - Fixed duplicate parameters in week view when using the shortcode [110284]
* Fix - Modify resource url function to work in mu-plugin directory, thanks to Doug for reporting it [86104]
* Fix - Correct behavior when using "day-of-month" recurrence rules, thanks to SiteCrafting for reporting this! [75258]
* Tweak - Improve the translatability of recurrence description text by making generic words like "day", "weeks", "year", etc. translatable in more contexts [106561]
* Tweak - Update the warning message for users who are breaking an event from the series, adding a note about possible 404s. Thanks Robert for reporting [72070]
* Tweak - Move the WordPress Custom Fields Metabox show|hide settings to The Events Calendar [109815]

* Fix - Enable recurrence rules to work on the initial date of recurrence, thanks to Matt for bringing this up.
* Fix - Fix month view shortcode to url when changing between months, thanks to ltcalendar for reporting
* Fix - Fix the view shortcodes to display the view titles, thanks to templodoser for the first report
* Fix - Modified the REST API root url for `/all` to query for all events belonging to a series
* Fix - Fix the Mini Calendar and Events Lists widgets styles in the customizer when previewed for the first time
* Fix - Not being able to disable Generate JSON-LD data for the Advanded Event List Widget, thanks Craig for the report of this
* Fix - Yearly exclusions description along with the different date option, thanks for the report Thomas
* Tweak - Utilize future event display on the Countdown Widget to go to the next event once the current event starts
* Tweak - Namespace javascript debug function to prevent conflicts causing a function found, thanks to Tom-Mulvey for the fix
* Tweak - Updated the "Additional fields" settings page, improving the UX
* Add - New action after saving venue geodata to the database

* Fix - Add back 3rd parameter to existing filter to prevent fatal errors with Yoast SEO and other 3rd party coding