[Bug] separate line doesn't display in dark mode

[NriotHrreion]

To Reproduce
Use --- (separate line) in the note, and switch to dark mode.

Expected behavior
A separate line displays in markdown preview.

Actual behavior
The separate line doesn't display.

Notes

But in light mode, it does.

[MasterKali06]

hi ... is this still open ? i assume it is .. just wanted to make sure
i like to start working on it

[piyushpatil4270]

Hii is this issue open, i'm thinking of working on it.

[NriotHrreion]

Hii is this issue open, i'm thinking of working on it.

But I'm afraid your PR won't be approved because there is likely not someone maintaining this project since the last commit was submitted on Aug 20, 2021.