Night Mode should be renamed Invert Colors
The use of the name Night Mode for Inverted Colors is misleading. If I see inverted colors I expect everything on the document to be inverted colors (images including), while when I think of Night Mode I expect the background to be dark, text to be white, but images and other colored based components remain the same.
This might sound a bit picky, but more and more we see Dark/Light themes and their impact on UI/UX, meaning that the use of certain naming conventions (aka Night Mode) might lead to misunderstanding of the feature.
Perhaps this should be another issue, but the inclusion of my definition of Night mode as an option would be interesting. Allowing the reader to have the benefits of reading on a dark background, while offering the images in their original colors.