fix Advanced option style on Execute modal

src/routes/safe/components/Transactions/GatewayTransactions/modals/ApproveTxModal.tsx

@@ -380,7 +380,10 @@ export const ApproveTxModal = ({
                     />
                   )}
                 </Row>
+              </Block>
 
+              {txEstimationExecutionStatus === EstimationStatus.LOADING ? null : (
+                <Block className={classes.gasCostsContainer}>
                   <TransactionFees
                     gasCostFormatted={gasCostFormatted}
                     isExecution={isExecution}
@@ -389,6 +392,7 @@ export const ApproveTxModal = ({
                     txEstimationExecutionStatus={txEstimationExecutionStatus}
                   />
                 </Block>
+              )}
 
               {/* Footer */}
               <Row align="center" className={classes.buttonRow}>