Missing schema for new settings

Hello @damienmckenna,
Applied your patch enabled module, Settings created correctly No errors.
I confirm that module is working after applying patch.
Also verified schema is defined correctly as type:integer.
Regards,

During a fresh Drupal 11.2.3 installation from existing configuration, the mercury_editor module reports two distinct schema validation warnings:

1. From the mercury_editor.menu.settings configuration:

[warning] Schema errors for mercury_editor.menu.settings with the following errors: mercury_editor.menu.settings:groups non-scalar value but not defined as an array (such as mapping or sequence).

2. From the mercury_editor.settings configuration:

[warning] Schema errors for mercury_editor.settings with the following errors: mercury_editor.settings:rollover_padding_block missing schema, mercury_editor.settings:rollover_padding_inline missing schema.

The existing MR updates the module's schema to properly define the data types for mercury_editor.menu.settings:groups and adds schema definitions for mercury_editor.settings:rollover_padding_block and mercury_editor.settings:rollover_padding_inline.

This resolves all the reported schema warnings only for new module installs, not for existing ones. I've added a post update hook to address existing configs that have empty groups as array.

I'm glad I found this issue!

I would like to confirm that this removed the warning for me on a new install. I am not able to test with a new install.