showloading - bug fix

Sometimes, the overlay would appear but the loading itself would not be
visible (outside the visible space of the element).  This will work
better now.
admin orders - fix bug in edit mode

If no CID was available from the list, when the editor opened it would
pass cid of 0, which returned data (ticket 2870965 ).
admin orders - enhancement to tracking

The tracking number will now be a link IF it's fedex, usps, dhl or usps.
admin media lib - squashed some bugs

Images can now be deleted again.
Image folders that had a small number of images (1-10ish) the images
didn't appear, just kept 'loading' graphic in place. This is fixed.  If
less than 20 images are present, they're all loaded right way.
admin - version