[AndyB] Convert image all 5.3

Description:

Converts all hot linked images to attachments.

The Convert image all add-on will convert hot linked images in messages to attachments. Hot linked images are those images that have been inserted using the Image icon in the editor toolbar.

(Example of hot linked image)
View attachment 2372

(Example of attachment)
View attachment 2373
Features:

• Images resizing is done with ImageMagick for best quality.
• Images resized to...

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• Added Show results to options page.

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Fixed issue with temporary file.

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Convert image all v4.6 changes:

Removed function which converted Proxy images.

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Fixed issue with dead link causing server error log.

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• Now support hot linked images using Alt text in IMG tag.

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Now supports alt text in the IMG bb_code. Now excludes posts and threads which are not visible.

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Now retains IMG bbcode options.

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• Fixed issue when multiple IMG tags were on the same line.

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• Attachment tables xf_attachment and xf_attachment_data are now updated more accurately to reflect original post date and post user id.

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