Bug 20216: Correctly populate values in itemtype editor

Bug 20216: Correctly populate values in itemtype editor

Caused by a bad merge conflict on bug 12768.

To test:
1 - Edit an item type, define a replacement cost,processing fee, and
remote image url
2 - Save the item type
3 - Values are correct in list
4 - Edit again
5 - note values in fields are not populated
6 - Save itemtype, values are lost
7 - Apply patch
8 - Repeat 1-4
9 - Values should be correctly populated and saved now

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Bug 20216: (follow-up) - Fix other use of remote_image

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>