Can not create batches for campaigns with 0 EFX reward #114
Description
Feature
It should be possible to create campaign with 0 rewards.
At the moment this is not possible (there is a silent failure in the UI, with an error printed to the console related to "transfer positive quantity)"
This is most likely because the smart contract tries to send a 10% fee (which amounts to 0). The fee should be skipped for free campaigns.