fix: remove unnecessary scrollbarc in empty addressbook in ff [lw-12706] (#1878)

Author: vetalcore

apps/browser-extension-wallet/src/features/address-book/components/AddressBook.modules.scss

@@ -14,7 +14,7 @@
 
 .emptyScreen {
   height: 100%;
-  margin-top: size_unit(10);
+  margin-top: size_unit(8);
 }
 
 .addressList {