message: Fallback to 0 instead of null to fix spinner.
diff: @@ -81,7 +81,7 @@ export function* setCurrentTimeBountySaga({
  const unit: string = yield select(derivedSelectors.getUnit);
  if (!validNumber(parseInt(raw, 10)) || !validDecimal(raw, decimal)) {
  - yield put(actions.setTimeBountyField({ raw, value: null }));
  + yield put(actions.setTimeBountyField({ raw, value: new BN(0) }));
  }
  const value = toTokenBase(raw, decimal);
  @@ -89,7 +89,7 @@ export function* setCurrentTimeBountySaga({
  const isValid = isInputValid && value.gte(Wei('0'));
  - yield put(actions.setTimeBountyField({ raw, value: isValid ? value : null }));
  + yield put(actions.setTimeBountyField({ raw, value: isValid ? value : new BN(0) }));
  }
  export const currentTimeBounty = takeLatest(
  