Show Timeset and Destination Set Names

and provide a Modal showing the Detail of each.

Except the case when there is only one mapping and the
destination_set.name is called "quickset_*". In that case show the
particular destinations of this destination set, in order to not confuse
a user who just configured a trivial cf via the simple view.

under Subscriber Preferences -> Call Forwards

Mantis: 3803, 3801