Papirus XApp Symbolic Icons is out: a drop-in set that gives the xsi-* icon names used by Linux Mint, Cinnamon, and the XApp projects proper Papirus artwork. Upstream draws its own Adwaita-derived versions and installs them into hicolor, so on a Papirus desktop every app asking for one of those names gets an icon that matches nothing around it. The set covers 628 of the 666 names, at 16, 22, and…