Fix modal text on username gone error

ts/components/EditUsernameModalBody.tsx

@@ -281,7 +281,7 @@ export function EditUsernameModalBody({
           }}
         >
           {i18n('icu:ProfileEditor--username--reservation-gone', {
-            username: currentUsername,
+            username: reservation?.username ?? nickname,
           })}
         </ConfirmationDialog>
       )}

ts/state/ducks/username.ts

@@ -433,6 +433,7 @@ export function reducer(
       return {
         ...state,
         usernameReservation: {
+          reservation: state.usernameReservation.reservation,
           state: UsernameReservationState.Open,
           error: UsernameReservationError.ConflictOrGone,
         },

ts/test-electron/state/ducks/username_test.ts

@@ -389,7 +389,10 @@ describe('electron/state/ducks/username', () => {
         getUsernameReservationState(state),
         UsernameReservationState.Open
       );
-      assert.strictEqual(getUsernameReservationObject(state), undefined);
+      assert.strictEqual(
+        getUsernameReservationObject(state),
+        DEFAULT_RESERVATION
+      );
       assert.strictEqual(
         getUsernameReservationError(state),
         UsernameReservationError.ConflictOrGone