Because they are already there if they need to.
That is fine. Adding them the second time will not change anything.
For example, if you use Help>Intro, the Intro file will not be added to recent files. If it is kept open, your patch means the file will be added at restart. This is wrong.
This is a separate issue. If you try to open a help file from the help menu, LFUN_HELPOPEN will be triggered and loadLyxFile(file, false) will be called. The file will not appear in lastfiles. If you start lyx with "lyx doc/.../tutorial.lyx", the file will be added to lastfiles. Since such help files should go to lastopenedfiles, I can think of two solutions 1. at start up, try to tell lyx to use loadLyxFile(file, false) for such files. This is difficult 2. remove the second parameter and check the nature of files added internally, maybe by checking file path. This is doable if help doc is the only file type that use loadLyxFile(.., false). Bo
