Changed value of collabSearchPrompt

Changed value of collabSearchPrompt to resolve https://pods.iplantcollaborative.org/jira/browse/CORE-4045#comment-33943
Update new DE header
Merge branch 'gxt3-sandbox' of github.com:iPlantCollaborativeOpenSource/ui-resources-module into gxt3-sandbox
core-4161 new header styles
CORE-3566 add iRods trash messages.

Imported from de-webapp repo.
CORE-3578 Updated messages and errors for unified data endpoints.
CORE-3580 Added empty trash error message.
Added Data Link display and error messages.

Updated searchHistory text from master.
CORE-3750 Added App references load error message.
Updated display strings from de-webapp master (1.6).
CORE-3733 Added partial restore display strings.
core-3915 fix typo

Added sharing display string from de-webapp master (1.6).
CORE-4079 Added defaultOutputFolderValidationError message.
Added display strings for app integration UI.
Added error strings for App Integration module.