[0.71.x] ensure topSites list rendering evaluate to null when its hidden

[cezaraugusto]

uplift request for #3297
fix brave/brave-browser#5710 on 0.71.x

[kjozwiak]

Restarting Linux due to npm run network-audit -- --output_path="src/out/Release/brave" failing as per https://staging.ci.brave.com/job/brave-browser-build-pr/job/ca-5710-71/1/execution/node/596/log/:

10:54:53  {"phase":0,"source":{"id":116,"type":9}]}
10:54:53                                         ^
10:54:53  
10:54:53  SyntaxError: Unexpected token ] in JSON at position 78276957
10:54:53      at JSON.parse (<anonymous>)
10:54:53      at start (/home/ubuntu/jenkins/workspace/rave-browser-build-pr_ca-5710-71/lib/start.js:144:23)
10:54:53      at Command.listener (/home/ubuntu/jenkins/workspace/rave-browser-build-pr_ca-5710-71/node_modules/commander/index.js:315:8)
10:54:53      at Command.emit (events.js:203:13)
10:54:53      at Command.parseArgs (/home/ubuntu/jenkins/workspace/rave-browser-build-pr_ca-5710-71/node_modules/commander/index.js:654:12)
10:54:53      at Command.parse (/home/ubuntu/jenkins/workspace/rave-browser-build-pr_ca-5710-71/node_modules/commander/index.js:474:21)
10:54:53      at Object.<anonymous> (/home/ubuntu/jenkins/workspace/rave-browser-build-pr_ca-5710-71/scripts/commands.js:155:4)
10:54:53      at Module._compile (internal/modules/cjs/loader.js:868:30)
10:54:53      at Object.Module._extensions..js (internal/modules/cjs/loader.js:879:10)
10:54:53      at Module.load (internal/modules/cjs/loader.js:731:32)
10:54:53  npm ERR! code ELIFECYCLE

[kjozwiak]

Uplift into 0.71.x approved after deliberating with @brave/uplift-approvers. Please make sure that all the correct labels are added and the associated issue is moved into the correct milestone.