Animate conversation selection and sorting

Kordophone/Shared/ConversationList.swift

@@ -23,6 +23,8 @@ struct ConversationList : View {
                     }
             }
         }
+        .animation(.spring(), value: sortedConversations)
+        .animation(.spring(), value: selectedConversation)
         .navigationTitle("Kordophone")
     }
 }