feat(GUI): add a validateWriteOnSuccess property to the flash event (#1333)
feat(GUI): add a validateWriteOnSuccess property to the flash event (#1333)

This event property will allow us to inspect how many people are running
Etcher without the validation mechanism.

See: https://github.com/resin-io/etcher/issues/1293
Signed-off-by: Juan Cruz Viotti <4148f5869aa1bcd7efd85b513a5874967e585032@openmailbox.org>
resin-io/etcher,resin-io/resin-etcher,resin-io/etcher,resin-io/herostratus,resin-io/etcher,resin-io/etcher,resin-io/herostratus,resin-io/etcher,resin-io/resin-etcher