Fix left schema issues

Problem/Motivation

Follow-up on #3179537: Reorganize and clean up old settings and configuration

Using https://www.drupal.org/project/config_inspector to test the configuration shows several open config schema errors. I just checked #3179537: Reorganize and clean up old settings and configuration and you can see in the commit, that there are still mistakes.

For example, instead of TRUE / FALSE for boolean values, they are set as 0 / 1 in the settings.

Furthermore, I think it might need a cleanup for existing pages to remove old config values that are no longer used.

Here are some examples from our project with zurb_foundation as base theme:

• features.favicon Shortcut icon boolean 1 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• features.node_user_picture User pictures in posts boolean 1 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• settings Undefined undefined missing schema
• logo.use_default Use default boolean 1 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• favicon.use_default Use the default shortcut icon supplied by the theme boolean 1 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_status_in_reveal Display status messages in Reveal boolean 0 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_use_respondjs Undefined undefined 0 missing schema
• zurb_foundation_meta_header_grid Contain Meta Header Region to Grid boolean 0 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_top_bar_enable Enable the top bar element integer 1 variable type is string but applied schema class is Drupal\Core\TypedData\Plugin\DataType\IntegerData
• zurb_foundation_top_bar_grid Contain the top bar to grid boolean 0 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_top_bar_sticky Make the top bar sticky boolean 1 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_top_bar_is_hover Hover to expand menu boolean 1 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_top_bar_custom_back_text Enable custom back text in dropdown boolean 0 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_top_bar_search Add search to top bar boolean 1 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_top_bar_languageswitcher Add language switcher to top bar boolean 0 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_page_site_name Undefined undefined 0 missing schema
• zurb_foundation_page_site_logo Undefined undefined 1 missing schema
• zurb_foundation_page_account_info Undefined undefined 0 missing schema
• zurb_foundation_disable_base_css Disable Base Theme CSS boolean 0 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_disable_base_js Disable Base Theme JavaScript boolean 0 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_block_copyright_show Display custom copyright block boolean 0 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData
• zurb_foundation_block_copyright_custom_text Set custom copyright block text boolean 0 variable type is integer but applied schema class is Drupal\Core\TypedData\Plugin\DataType\BooleanData

Steps to reproduce

1. Install & enable zurb_foundation theme
2. Install & enable https://www.drupal.org/project/config_inspector
3. See the config_inspector report "Errors only"
4. Additionally review the config after saving the zurb_foundation settings form, as it may change the configuration. The results of the form save should also be checked, not just the initial configuration

Proposed resolution

1. Fix the left config issues
2. Does anyone know if there are tests possible to check for such issues?

Remaining tasks

User interface changes

API changes

Data model changes