feat(GUI): blacklist drives with an env var (#2315)
feat(GUI): blacklist drives with an env var (#2315)

We add an environment variable `ETCHER_BLACKLISTED_DRIVES` that allows
us to filter certain drives from ever showing up in Etcher with comma
separated device paths, e.g. `/dev/sda,/dev/sdb,/dev/mmcblk0`.

Closes: https://github.com/resin-io/etcher/issues/2264
Change-Type: patch
Changelog-Entry: Allow blacklisting of drives through and environment
variable ETCHER_BLACKLISTED_DRIVES.
resin-io/herostratus,resin-io/resin-etcher,resin-io/etcher,resin-io/herostratus,resin-io/etcher,resin-io/etcher,resin-io/etcher,resin-io/etcher,resin-io/resin-etcher