Liberation sans unavailable as substitution font

[DmitryBarashev]

Tasks not displayed when exported to PDF in macOS Mojave

An update on this: I still don’t know the reason why some fonts may not render some glyphs on macOS. As a workaround, I added Droid Sans Fallback font to GanttProject and made it registering itself in the list of application and chart fonts, so that installation is not required. This font covers a wide range of character sets, including CJK, so hopefully it will be a good fallback font. A few bugs with font registration were fixed. They might be the cause of this issues, however, as I said abo…