Fix thumbnail

[aaravlu]

We must apply the thumbnail format for the image anyhow it possess a thumbnail source or not.

Btw, an image won't possess a thumbnail source unless its size is larger than 500KB or so, by my test.

before:

after:

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Btw, an image won't possess a thumbnail source unless its size is larger than 500KB or so, by my test.

I found this by accident on deving, you can take a look (notice the size I marked)

[kevinaboos]

Thanks for the fix! Always good to save bandwidth with thumbnail.