Use nicer on-hover name 'Directory tree' for treeview syntax

Changed files
+1
public
+1
public/prism.js
··· 1627 1627 "shellsession": "Shell session", 1628 1628 "sql": "SQL", 1629 1629 "systemd": "Systemd configuration file", 1630 + "treeview": "Directory tree", 1630 1631 "ts": "TypeScript", 1631 1632 "tsconfig": "TSConfig", 1632 1633 "uri": "URI",