Made CreateDefectRequestObserver and UpdateDefectRequestObserver more robust in terms of error handling.
Made error dialog more descriptive for search in defect tracker.
updated Janeway login to have more descriptive errors
updated defect tracker search observer error messages
updated error dialogs in defecttracker defect save observers
changed login error dialog in Janeway login to display an ERROR_MESSAGE icon
added 403 error message to LoginRequestObserver
Merge branch 'dev-exemplar' into dev-exemplar-defectview-observer-robustness