fix: use xDAI and xBZZ on Gnosis chain (#454)

* fix: use xDAI on Gnosis chain

* fix: rename BZZ to xBZZ when on Gnosis chain

* fix: replace MINIMUM_xDAI with MINIMUM_XDAI

* fix: update xdai links to correct gnosis chain urls

src/components/CashoutModal.tsx

@@ -79,7 +79,7 @@ export default function CheckoutModal({ peerId, uncashedAmount }: Props): ReactE
             )}
             {!loadingCashout && (
               <span>
-                Are you sure you want to cashout <strong>{uncashedAmount} BZZ</strong> from Peer{' '}
+                Are you sure you want to cashout <strong>{uncashedAmount} xBZZ</strong> from Peer{' '}
                 <strong>{peerId}</strong>?
               </span>
             )}

src/components/WithdrawDepositModal.tsx

@@ -96,7 +96,7 @@ export default function WithdrawDepositModal({
           />
           {amountError && (
             <FormHelperText error>
-              Please provide valid BZZ amount (max 16 decimals). Error: {amountError.message}
+              Please provide valid xBZZ amount (max 16 decimals). Error: {amountError.message}
             </FormHelperText>
           )}
         </DialogContent>