fix: claimed reward messaging

Make it clear that the rewards history may not be part of the current wallet. Some users were confused when  not backing up or using multiple wallets.

src/renderer/component/rewardListClaimed/view.jsx

@@ -26,6 +26,12 @@ const RewardListClaimed = (props: Props) => {
     <section className="card card--section">
       <header className="card__header">
         <h2 className="card__title">Claimed Rewards</h2>
+
+        <p className="card__subtitle">
+          {__(
+            'Reward history is tied to your email. In case of lost or multiple wallets, balance may differ from amounts claimed'
+          )}.
+        </p>
       </header>
 
       <table className="table table--rewards table--stretch">