Full size picture preview

Please add the possibility to preview pictures in BLOBs in their original size.

I regularly browse through graphs stored as pictures in BLOBs and the text within the graphs gets distorted by the resizing.

Perhaps it could be also possible to detach the preview into a separate window, so that it would be easier to cope with full size previews or even to use a fullscreen preview on different monitor as it is possible right now with the internal text editor.