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/pages/account/chequebook/AccountChequebook.tsx

@@ -33,19 +33,19 @@ export function AccountChequebook(): ReactElement {
           <ExpandableList label="Chequebook" defaultOpen>
             <ExpandableListItem
               label="Total Balance"
-              value={`${chequebookBalance?.totalBalance.toFixedDecimal()} BZZ`}
+              value={`${chequebookBalance?.totalBalance.toFixedDecimal()} xBZZ`}
             />
             <ExpandableListItem
               label="Available Uncommitted Balance"
-              value={`${chequebookBalance?.availableBalance.toFixedDecimal()} BZZ`}
+              value={`${chequebookBalance?.availableBalance.toFixedDecimal()} xBZZ`}
             />
             <ExpandableListItem
               label="Total Cheques Amount Sent"
-              value={`${settlements?.totalSent.toFixedDecimal()} BZZ`}
+              value={`${settlements?.totalSent.toFixedDecimal()} xBZZ`}
             />
             <ExpandableListItem
               label="Total Cheques Amount Received"
-              value={`${settlements?.totalReceived.toFixedDecimal()} BZZ`}
+              value={`${settlements?.totalReceived.toFixedDecimal()} xBZZ`}
             />
             <ExpandableListItemActions>
               <WithdrawModal />

src/pages/account/wallet/AccountWallet.tsx

@@ -50,10 +50,10 @@ export function AccountWallet(): ReactElement {
             <ExpandableListItemKey label="Node wallet address" value={nodeAddresses.ethereum} expanded />
           </Box>
           <Box mb={0.25}>
-            <ExpandableListItem label="XDAI balance" value={`${balance.dai.toSignificantDigits(4)} XDAI`} />
+            <ExpandableListItem label="xDAI balance" value={`${balance.dai.toSignificantDigits(4)} xDAI`} />
           </Box>
           <Box mb={2}>
-            <ExpandableListItem label="BZZ balance" value={`${balance.bzz.toSignificantDigits(4)} BZZ`} />
+            <ExpandableListItem label="xBZZ balance" value={`${balance.bzz.toSignificantDigits(4)} xBZZ`} />
           </Box>
         </>
       ) : (