Fix Model\Widget#getConfigAsObject losing it's type declaration

[Stoux]

Description (*)

Fix an issue where the getConfigAsObject() method loses it's type declaration. This causes issues for any class that extends the Model class and requires it in the prepareWidgetParameters method.

Due to the order of the data calls the setType call (which is a magic setData('type') method) will be overwritten by the following setData call.

Manual testing scenarios (*)

1. Create a Override class that extends Magento\Widget\Model\Widget
2. DI the new class <preference for="Magento\Widget\Model\Widget" type="Your\New\Model" />
3. Override prepareWidgetParameters(DataObject $object)
4. Dump $object->getType(), the result will be null instead of the Widget type

After this PR it will return the class of the Widget in question.

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-cicd2]

All committers have signed the CLA.

[magento-engcom-team]

Hi @Stoux. Thank you for your contribution
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[magento-engcom-team]

Hi @VladimirZaets, thank you for the review.
ENGCOM-4035 has been created to process this Pull Request

[magento-engcom-team]

@Stoux thank you for contributing. Please accept Community Contributors team invitation here to gain extended permissions for this repository.

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