Making configurable settings for MAX_IMAGE_WIDTH and MAX_IMAGE_HEIGHT

[eduard13]

Description

It was added a new system fieldset, where the max-width and max-height can be set.
Stores / Configuration / Advanced / System / Images Configuration

So these 2 values are more flexible now for those which need to have bigger images in their shops.

Fixed Issues (if relevant)

1. \Magento\Framework\Phrase\Renderer\Placeholder::render() can't handle more than 9 placeholders #1374: Wysiwyg > Image Uploader >Max width/height
2. ...

Manual testing scenarios

1. Get an image of 3000x700
   https://dummyimage.com/3000x700
2. Open any wysiwyg editor
3. Upload an image

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]

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[magento-engcom-team]

Hi @eduard13

Unfortunately, we cannot accept Pull Requests from branches created in magento2 repository.
Please use your own fork as a base for this Pull Request.

Thank you.