core-4212 refactor sharing dialog
fix text for save session
CORE-4193: Added externalized strings for Hierarchical list widgets
CORE-4239 Removed top style from Announcer.css.

This will allow different announcers to position their own announcements.
# WARNING: head commit changed in the meantime

IN PROGRESS - issue CORE-4296: The DE needs to have a window for viewing
system messages. 
https://pods.iplantcollaborative.org/jira/browse/CORE-4296

Externalized remaining system messages window messages.
add new strings for i18n
Merge branch 'master' of github.com:iPlantCollaborativeOpenSource/ui-resources-module
Merge branch 'master' into STABLE