None of the changeable colors for the theme of the UI are applied to the new UI

[Softvision-GeluHaiduc]

[Affected Versions]:

• Firefox Release 86.0.1
• Chrome 89.0.4389.82

[Affected Platforms]:

• Windows 10x64

[Prerequisites]:

• Make sure to be logged in as an admin on the hubs cloud instance.
• Have the Admin Panel opened.

[Steps to reproduce]:

1. Click the "App Settings" list item from the left side menu in the "Setup" section.
2. Click the "Theme" tab in the page.
3. For each color change it to a different one and save the changes.
4. Go to "https://svtesthub.com/" and observe the UI.

[Expected results]:

• The changed colors of the theme are shown on the UI.

[Actual results]:

• The changed colors of the theme are not shown on the UI except for preferences.

┆Issue is synchronized with this Jira Task