Issue 50976 - Clean up Web UI source directory from unused files
Description: We ship unused files under src/cockpit/389-console/src.
We should clean them up. It includes: static, fonts, images and
banner.htmp.
Also, fix index.html and webpack.config.js accordingly.
https://pagure.io/389-ds-base/issue/50976
Reviewed by: mreynolds (Thanks!)