Updated icon for the Mac build?

[burt]

@e.comanici There was a beta released yesterday.

Local Beta 6.3.1

Download Local 6.3.1 (Beta) for macOS SHA1: ac095c332f0bb0533ec1776c5931bd6e895a30c2 Download Local 6.3.1 (Beta) for Windows SHA1: 16c0fd5f6dbfbe365a11bfd347c02263dc598a80 Download Local 6.3.1 (Beta) as Linux deb (Ubuntu, Debian, Mint) SHA1: 3c8bfb1f2a755c9d7d5c79b1cd459536c4432973 Download Local 6.3.1 (Beta) as Linux rpm (Fedora, Red Hat Linux, CentOS) SHA1: a767794589b7f912f3ac4325027346cc1703e96d Improvements Sites that have been built using the Atlas add-on are now sup…