Delegate feature should work for all assignments, notification and updates not just for approvals

[#1]

Description - The Delegate feature should include all the options like assignments, access to campaigns, email notifications/updates,etc and should not only limit to approvals.

Why is this feature important to you - We have set up assignments for group leads who if go on vacations, we have to manually change the assignments for that period to anyone who is covering up for them. Also when they are back, it needs to be assigned back to group leaders. This is done on routers on queu topics or through fusion scenarios in some cases where we need to update everytime. If this can be covered under delegations, it would be great.

How would you like the feature to work - It should automatically pick any assignments/notifictaion/ownership of campaigns to be asisgned to the delegated user.

Current Behaviour - It only works for approvals, not for assignments and updates and project ownership.