As of todays update (2021-12-15) this extension is deprecated and should no longer be used.
This very simple extension adds a button to the sidebar selection window that enables all record types, and sorts them alphabetically. This is a little different than the default "All" buttons sorting.
This was based on CoreRPG and should be compatible with all CoreRPG based rulesets.
https://imgur.com/LwAXSrZ.jpg
https://imgur.com/3IgrgYD.jpg