[AndyB] Attachment editor 2.2

Allows rotating, resizing and adding a border to attachments.

(Example of Attachment editor link)
View attachment 21781
(Example of Attachment editor page)

View attachment 21782

(Example of Options page)
View attachment 21784



(Example of User group permissions)

View attachment 21783


Features:

• Attachment editor link will be shown in post and conversation messages.
• PNG images are converted to JPG.
• All phrases...

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Fixed issue with Add border function.

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Fixed link in conversation template.

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• Fixed issue with int precision loss.

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Updated abstracted file system code.

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• Now shows attachment size. Can now be used to convert PNG to JPG without any other changes to the image.

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• Improved thumbnail image resolution.

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Remove no longer used code in a template.

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Compatible XF 2.x versions: 2.3

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Now also properly works in direct messages.

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