Added the ability to save and continue editing in cataloging.

This patch adds the ability for catalogers to save and continue editing when adding new biblios.
This is helpful in the event of a power failure or perhaps in the event you step away for a sandwich and your co-worker closes your tab to look at cats.

To Test:

Select an existing item or create a new item in cataloging using your favorite framework.
Edit the item
From the save menu in the dropdown, select the new option of "Save and continue editing"
If you are missing requited fields you should still be prompted to fill them in before saving
Once all required fields are in place you should be allowed to save and should be on the same page
(You're fresh bib record should also be saved)

http://bugs.koha-community.org/show_bug.cgi?id=7883

Modified:

Changed malformed urls in form submits
Merge branch 'bug_7883' of https://github.com/libsysguy/koha-wip into bug_7883