Revert "gui: Update transifex slug for 0.19"
Revert "gui: Update transifex slug for 0.19"

This reverts commit 837a801a6dad9d7e12a1bd8cb6c9e70976ee6cf9.

chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin