#966 (continue'd): Allow attachments of several files to the same ticket (the previous fix breaks after attaching 1 file)

git-svn-id: http://svn.code.sf.net/p/itop/code/branches/2.0@3290 a333f486-631f-4898-b8df-5754b55c2be0
#966 Prevent duplication of attachments when the form gets reloaded.

git-svn-id: http://svn.code.sf.net/p/itop/code/branches/2.0@3295 a333f486-631f-4898-b8df-5754b55c2be0