Fixed the InvMenu error the occurs on PHP 7.4

Merge branch 'master' into stable

1.2.5 release prepare

Wait until the rich customization release...

Keep working on the island chest InvMenu session

Translate submit block inventory panel inputs and generation preview inventory panel outputs

Added virion missing errors

Optimized the export of random generation regex in an export of island

Removing a random generation regex will clean up the random generation blocks around the world

Did some smol fixes on forms

Allow user to remove an element

Fixed the sending of wrong fallback forms

Fixed the generation preview inventory panel will not send the the player

Random generation regex elements editor is now working

Fixed errors in forms and inventories