Description
Filebrowser (vanilla docker container setup) is set up to use the "System Default" theme in "Global Settings".
Opening a text file in file browser should open the text file also in dark mode, however the top and left panel are following the dark theme, while the text file panel is light theme.

Expected behavior
Opening a text file in file browser should open the text file panel also in dark mode (i.e dark background with light color font).

What is happening instead?
Opening a text file in file browser the top and left panel are following the dark theme, while the text file panel is light theme (white background with dark font).

Additional context

How to reproduce?

1. Vanilla Docker set up for file browser
2. Set theme to "Dark" in Global Settings. (Or "System Default" theme in case your Browser / OS is set to use Dark theme)
3. Opening file browser should open in Dark theme by default.
4. Open a text file, and you will see the issue where the text file does not follow dark theme.