fix column ordering in department
fix bug 50159411
fix duplicated dialog instances bug
redirect to the referer page when feedback saved successfully
Merge remote-tracking branch 'vmw-tmpst/master' into feedback

Conflicts:
	app/views/openings/index.html.slim
Merge pull request #192 from whywhy36/feedback

1. fix some bugs of feedback dialog
2. redirect to the original page when feedback saved successfully