ID 499779 - Unable to drag and drop Shelf images to use as Paint Through texture

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Problem summary
Unable to drag and drop Shelf images to use as Paint Through texture

Customer reported version
Mair 4.8v1

Customer reported platform
Windows 10

Steps to reproduce

1) Open any project

2) Import an image into the Shelf

3) Switch to the Paint Through tool, and then drag and drop the image into the Canvas

Expected behaviour
The image should be used as the Paint Through texture, and the preview should be displayed in the Canvas.

Actual behaviour
Nothing happens.

Workaround
It's possible to workaround this issue by first double-clicking the image to import it into the Image Manager.
Dragging the image from the Image Manager into the Canvas will then use it as the Paint Through texture.
 
Images imported into the Image Manager first, and then dragged into the Shelf are unaffected by this issue.

Reproduced by support
This bug has been reproduced in:
Mari 5.0v1 - Windows 10 - CentOS 7.9
Mari 4.8v1 - Windows 10 - regression

Unable to reproduce bug in:
Mari 4.7v6 - Windows 10 - CentOS 7.9

Earliest version tested
Mari 4.7v6 - This issue doesn't appear in this version and has regressed
 

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