Resize attachments all

xF2 Add-on Resize attachments all 1.6

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The Limit set in the options page will limit the number of posts to process.
Changed options page defaults maximum width and height to 2500.
Added note to indicate the add-on will only resize attachments in thread posts.
Fixed issue dealing with internal_data file missing in file directory.
Fixed issue dealing with thumbnails which are missing in the file directory.