Use "sandboxed-tor-browser" for yawning's sandbox we ship
Right now, the sandboxed-tor-browser we ship is called sandbox-X.X.XX-linux64-zip. That is confusing as we have changelog entries for sandboxed-tor-browser but not some sandbox and we ship Firefox with a sandbox enabled as well. And, above all, the application is sandboxed-tor-browser not some plain sandbox.
We should rename what we ship accordingly.