[DS-2300] Different visualisation of author fields in Mirage 2
support batch import of Simple Archive Format via upload file
display a more explanatory message in batch import success with a link to where the user can see his batch imports
display item handles (with links) in batch import report
revise some message properties keys
add missing message properties
bug fix: add missing javascript function to show/hide items div
fix problem with a localized message that appears as literal
for erroneous imports, stacktrace is displayed in email sent to user + in the import log history
fix order of imports display in history
fix bug with import resuming
fix typo in message properties
change styling of info message in batch import success
style error stacktrace message in import history for failed imports
change order of batch import type selection options (first SAF local upload and then SAF remote)
display other collections select box only if owning collection is already selected
when batch import fails, pass to JSP the old values in order to display them again
bug fix: take care the first time the batch import page is displayed
Merge pull request #765 from EKT/DS-2336

DS-2336: Some enhancements regarding UI Batch Import (JSPUI)
Merge pull request #751 from rivaldi8/DS-2300-authors-visualisation-mirage2

[DS-2300] Different visualisation of author fields in Mirage 2