Bump react-icons from 4.6.0 to 4.12.0 in /app

Bumps [react-icons](https://github.com/react-icons/react-icons) from 4.6.0 to 4.12.0.
- [Release notes](https://github.com/react-icons/react-icons/releases)
- [Commits](react-icons/react-icons@v4.6.0...v4.12.0)

---
updated-dependencies:
- dependency-name: react-icons
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

app/package.json

@@ -28,7 +28,7 @@
     "react-dnd-html5-backend": "^11.1.3",
     "react-dom": "^17.0.2",
     "react-hotkeys": "^2.0.0",
-    "react-icons": "^4.1.0",
+    "react-icons": "^4.12.0",
     "react-redux": "^7.2.4",
     "react-resize-detector": "^6.7.2",
     "react-scripts": "^4.0.3",