The Linux wrapper renamed the executable to Paseo.bin and exec'd it with
--no-sandbox, which surfaced as Paseo.bin in the dock and process list on
Ubuntu. Drop the wrapper and the chrome-sandbox deletion entirely. .deb/.rpm
now ship chrome-sandbox SUID 4755 (electron-builder 26 default postinst,
matches VS Code) and run Paseo directly with the Chromium sandbox on.
AppImage cannot carry SUID, so --no-sandbox is now injected at runtime only
when process.env.APPIMAGE is set.
Fixes#602
Re #381