feat: add signet support, closes #3771

tests-legacy/integration/settings/settings.spec.ts

@@ -75,6 +75,6 @@ describe(`Settings integration tests`, () => {
     const networkListItems = await wallet.page.$$(
       createTestSelector(SettingsSelectors.NetworkListItem)
     );
-    expect(networkListItems).toHaveLength(3);
+    expect(networkListItems).toHaveLength(4);
   });
 });