Cloud storage banner in settings appears almost completely white

[polygonnedpotato]

Prerequisites

• [x ] I verified that this is not a filter issue
  • Filter issues MUST be reported at filter issue tracker
• [x ] This is not a support issue or a question
  • Support issues and questions are handled at /r/uBlockOrigin
• [x ] I performed a cursory search of the issue tracker to avoid opening a duplicate issue
  • Your issue may already be reported.
• I tried to reproduce the issue when...
  • uBlock Origin is the only extension
  • uBlock Origin with default lists/settings
  • using a new, unmodified browser profile
• [x ] I am running the latest version of uBlock Origin
• [x ] I checked the documentation to understand that the issue I report is not a normal behaviour

Description

[Description of the bug or feature]
The cloud storage bannershows up with white fonts in dark mode

A specific URL where the issue occurs

[A specific URL is MANDATORY for issue happening on a web page, even if it happens "everywhere"]

Steps to Reproduce

1. [First Step]
   open settings
2. [Second Step]
   Check "I am an advanced user" and set "uitheme" to "dark" and hit apply changes
3. [and so on...]
   open "Filter lists", "My filters", "My rules", or "Trusted sites".

Expected behaviour:

the banner should show up with a dark background
[What you expected to happen]

Actual behaviour:

the banner shows up with white font and background
[What actually happened]

Your environment

• uBlock Origin version: 1.31.2
• Browser Name and version: Chrome 86.0.4240.199
• Operating System and version: Chrome OS (64-bit) 86.0.4240.199

[gorhill]

https://github.com/gorhill/uBlock/wiki/Advanced-settings#uitheme:

For development purposes only! DO NOT create issues about this feature!

Since asking people to not file issue does not work, I will disable the setting to prevent such invalid issue.