fix(staking): fix delegations with stake key (de)registrations being omitted from activity (#713)

Author: refi93

apps/browser-extension-wallet/src/views/browser-view/features/activity/helpers/common-tx-transformer.ts

@@ -70,7 +70,12 @@ const splitDelegationTx = (tx: TransformedActivity): TransformedTransactionActiv
     ];
   }
 
-  return [];
+  return [
+    {
+      ...tx,
+      type: 'delegation'
+    }
+  ];
 };
 
 const transformTransactionStatus = (status: Wallet.TransactionStatus): ActivityStatus => {