CRAFTER-1299

Go live dialog was getting stuck in a recursive loop when a large amount of data was getting approved. We've done the following changes:

1. add publish date/time column to "go live queue" and "my recent activity"
2. when "go live" or "schedule":
	a determine whether all items have the same launch date (client side)
		- if they all have same date, go into schedule dialog and prepopulate the dialog with either the "NOW" option selected or the "Schedule Date Time" prepopulated to date all items are set to go live
		- if *NO* pop up a warning with a message warning that there are mixed schedules and moving forward would launch them all at the same time
	b modified date column to be readonly and head to be orginial schedule