[dev] Ansel saveImage fix

[Duck]

Fix the saveImage call to use the imageID instead of image names.

And I was forced to revert the usage of $GLOBALS["ansel_shares"]. I still 
don't know why, but when $ansel_shares is reset by the "app" parameter, 
outside calls like Ansel::createGallery still uses the old values - with 
groud_uid = "horde.share.ansel". I tried on 3 different systems and is the 
same. Maybe a php 4.3.9 bug.

Duck
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