Revert "[unity] Fix 0003_Revert_r3134_Remove_Systray_Whitelist.patch"

This reverts commit aa93c1f20f5971a7379991e3b724bc05200be3cf.
Revert "[unity] Update to version 6.12.0daily13.03.06.1 with Ubuntu release 0ubuntu1"

This reverts commit d5345cbc5de0557876f3895b825a82c1670a7ed0.
[unity] Revert to older version until I figure out why the newer versions do not compile