[5.2] Fix saving edited images in media manager

[Hackwar]

Summary of Changes

When editing an image and trying to save it in 5.2-dev, the save button returns an error instead of saving the image. This PR fixes that.

Testing Instructions

Go to the media manager and edit an image. Rotate the image for example and open the developer tools. Click the Save button at the top.

Actual result BEFORE applying this Pull Request

See an error in the browser developer tools and the image isn't saved.

Expected result AFTER applying this Pull Request

The image is properly saved.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[brianteeman]

I have tested this item ✅ successfully on d4b4769

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[richard67]

It seems that change got lost when merging up PR #43906 , possibly due to some conflict resolution.

[exlemor]

I have tested this item ✅ successfully on d4b4769

I have tested this successfully. I have cropped, rotated, resized, re-cropped, re-rotated. All worked without issue.

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[richard67]

RTC

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