Dark Mode does not survive beyond the current session #178

Synopsis

Dark mode does not survive beyond the current session. A simple refresh will revert to default 'light mode'.

Expected behaviour:

If dark mode is selected, it is expected that it should survive to future sessions (e.g. via cookie).

Actual behaviour:

Refresh of page (or close reopen browser) results in return to default 'light mode'.

Steps to reproduce:

• Step 1: Select dark mode
• Step 2: Refresh the page

Additional Information

• Version Info
  • Flexget: 3.5.17
  • Web UI: 2.0.28
  • API: 1.8.0
• Installed via official docker image
  • "org.opencontainers.image.created": "2023-01-03T15:15:41.599Z",
  • "org.opencontainers.image.description": "The official FlexGet repository",
  • "org.opencontainers.image.licenses": "MIT",
  • "org.opencontainers.image.revision": "340b6d7995e476a7296b6a721ae811bbbedfdd6f",
  • "org.opencontainers.image.source": "https://github.com/Flexget/Flexget",
  • "org.opencontainers.image.title": "Flexget",
  • "org.opencontainers.image.url": "https://github.com/Flexget/Flexget",
  • "org.opencontainers.image.version": "3.5.17"