switch to a less generic icon

public/favicon.ico

public/service-worker.js

public/static/css/material-icons.css

public/static/icons/icon-120x120.png

public/static/icons/icon-128x128.png

public/static/icons/icon-144x144.png

public/static/icons/icon-152x152.png

public/static/icons/icon-167x167.png

public/static/icons/icon-16x16.png

public/static/icons/icon-180x180.png

public/static/icons/icon-192x192.png

public/static/icons/icon-256x256.png

public/static/icons/icon-32x32.png

public/static/icons/icon-512x512.png

public/static/icons/icon-96x96.png

public/static/icons/travelynx.svg

public/static/manifest.json

public/static/v18

templates/layouts/default.html.ep