Can't ignore keys that contain colon (:) character

Summary

Config Ignore uses the colon (:) as a separator when targeting individual keys to ignore in configuration.

For example, in search_api.index config, you can have configuration that looks like this:

...
datasource_settings:
  'entity:node':
    bundles:
      default: true
      selected:
        - event
        - homepage
    languages:
      default: true
      selected: {  }
...

In my case we want to ignore the languages portion here. So, in my config ignore settings I have the following entry:

search_api.index.global_search:datasource_settings.entity:node.languages.selected

This gets passed into $ignored = explode(':', $ignored) which results in the following split values:

search_api.index.global_search
datasource_settings.entity
node.languages.selected

Suggested Resolution

All instances of explode(':', $ignored) should be corrected to say explode(':', $ignored, 2).