Fixed approve confirmation logic (#12511)

ui/components/app/modals/edit-approval-permission/edit-approval-permission.component.js

@@ -103,11 +103,11 @@ export default class EditApprovalPermission extends PureComponent {
                   'edit-approval-permission__edit-section__option-label--selected': selectedOptionIsUnlimited,
                 })}
               >
-                {new BigNumber(tokenAmount).lessThan(
+                {new BigNumber(tokenAmount).equals(
-                  new BigNumber(tokenBalance),
+                  new BigNumber(MAX_UNSIGNED_256_INT),
                 )
-                  ? t('proposedApprovalLimit')
+                  ? t('unlimited')
-                  : t('unlimited')}
+                  : t('proposedApprovalLimit')}
               </div>
               <div className="edit-approval-permission__edit-section__option-description">
                 {t('spendLimitRequestedBy', [origin])}