Color issues with dark theme in help

When using the dark theme and dark colors for the text editor, the background of the help window stay white. It is not a big issue if the help can't be displayed with a dark background too, but the selection colors (text and background) are wrong. The text is white as his background during the selection, this make the find feature unusable.

It seems that some theme colors are used, but not all and it leads to readability issues.