Document Editor: Documents which starts a + (plus sign) are not handled

This bug has several effects:

Documents with a plus sign are not handled properly, not working well on 5.5 build 2036 and even worse on the  5.5 beta.

Old Editor:

1. Create documents with keys: 123Document, +123Document, Doc+ment
2. All documents are created and shown properly

Switch to the new editor (in 5.5Beta, You will get an error "Error with retrieving document" and "Object not found" exceptions, basically crashes.

Switch to 5.5 - 2036 - you will just won't see the documents

New Editor

1. Create documents with keys: 123Document, +123Document, Doc+ment
   1. 123Document would be created properly
   2. +123Document will be created as 123Document
   3. Doc+ment will be created as "Doc ment"