Comment # 3 on bug 1209453 from Soc Virnyl Estela

Seems the build commented out `LINUX_STANDARD_PATHS`. Probably an AppImage
thing? Removing the comment fixes the issue as I don't see any blank pages even
after moving around the ToC too much. I will marked this as FIXED. Please open
a new bugzilla report and link this bsc#1209453 if something related happens.
thanks!