Fixes theme header logo and icon upload

[wiardvanrij]

Description (*)

With the change of "fileuploader" to "imageuploader" the correct formElement was not updated to match the new "imageuploader".

Fixed Issues (if relevant)

1. Unable to upload Logo, Magento 2.3.0 Beta18 #18688: Unable to upload Logo, Magento 2.3.0 Beta18
2. ...

Manual testing scenarios (*)

1. Use magento2.3 development branche
2. Content -> Design -> Configuration -> edit any Default Store View
3. Other Settings -> Header -> try to upload a favicon or logo

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-engcom-team]

Hi @wiardvanrij. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
• @magento-engcom-team give me $VERSION instance - deploy vanilla Magento instance

For more details, please, review the Magento Contributor Assistant documentation

[rogyar]

@magento-engcom-team give me 2.3-develop instance

[magento-engcom-team]

Hi @rogyar. Thank you for your request. I'm working on Magento 2.3-develop instance for you

[magento-engcom-team]

Hi @rogyar, here is your Magento instance.
Admin access: http://ec2-34-228-235-121.compute-1.amazonaws.com/i-18851-2-3-develop//admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[rogyar]

@magento-engcom-team give me test instance

[magento-engcom-team]

Hi @rogyar. Thank you for your request. I'm working on Magento instance for you

[magento-engcom-team]

Hi @rogyar, here is your new Magento instance.
Admin access: http://ec2-34-228-235-121.compute-1.amazonaws.com/pr-18851//admin
Login: admin Password: 123123q

[magento-engcom-team]

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

[wiardvanrij]

Anyone knows why travis did not run properly?

[rogyar]

The issue with Travis will be fixed soon

[magento-engcom-team]

Hi @wiardvanrij. Thank you for your contribution.
We will aim to release these changes as part of 2.3.1.
Please check the release notes for final confirmation.

[ekisaj]

Hello, I am facing the same problem, I cannot upload logo/favicon image. I am using Magento 2.3.0 and php 7.2.8. Anyone with a fix?

[webusat]

I have the same problem with a fresh install of 2.3 trying to change the Transactional Email Logo. I click Upload to upload the logo image, choose the image and I get a running circle for a second and nothing is ever added. No logo image is displayed in the backend at all and the image in the email is still the default Magento logo. I can confirm that changing the core design_config_form.xml (not recommended) @valikvali does work.