Re-routing user after a contract self destruct

[Amit-Weiss]

After a channel is closed, we perform a self destruct to its contract. Due to that, we cannot re-route to the "show" page, since the contract no longer exists and it will show nothing.
This issue needs to be addressed, because we still want the user to view data for at least a little after.

[Amit-Weiss]

Using the new template for bugs

Describe the bug
After a channel is closed, we perform a self destruct to its contract. Due to that, we cannot re-route to the "show" page, since the contract no longer exists and it will show nothing.

To Reproduce
Steps to reproduce the behavior:

1. Create a new Deposit contract, follow all the stages up to (and including) closing the channel.
2. Through the manage as initiator/counterpart page try to draw the remaining balance.
3. Observe you stay on the same page.
4. When you try to enter the URL to the show page of the contract you will not be able to do so.

Expected behavior
We expect to see the contract as closed and funds withdrawn, to know that everything went as expected.

Desktop (please complete the following information):

• Browser: Firefox, Chrome