Allow staff to change date for suspension/silence

Currently, if you suspend/silence a user, and later think of extending or shortening the length of suspension/silence, you have to unsilence/unsuspend the user, and change the date again by suspending/silencing the user again, but use a different time. I think this is inefficient. Adding a Change date button will solve this problem. With this button, we can quickly change the date for the suspension/silence of the user. Something like this might be nice: