Add 'Sync with computer' theme option (#4973)

src/extensions/registries/__tests__/page-registry.test.ts

@@ -29,6 +29,10 @@ jest.mock("electron", () => ({
     on: jest.fn(),
     handle: jest.fn(),
   },
+  ipcRenderer: {
+    on: jest.fn(),
+    invoke: jest.fn(),
+  },
 }));
 
 console = new Console(stdout, stderr);