Pontoon: Update Czech (cs) localization of MDN
Pontoon: Update Czech (cs) localization of MDN

Localization authors:
- David Walczysko <wal.davca@gmail.com>

jwhitlock/kuma,Elchi3/kuma,a2sheppy/kuma,SphinxKnight/kuma,ollie314/kuma,escattone/kuma,jwhitlock/kuma,safwanrahman/kuma,escattone/kuma,yfdyh000/kuma,yfdyh000/kuma,safwanrahman/kuma,SphinxKnight/kuma,ollie314/kuma,SphinxKnight/kuma,a2sheppy/kuma,safwanrahman/kuma,jwhitlock/kuma,SphinxKnight/kuma,mozilla/kuma,SphinxKnight/kuma,escattone/kuma,jwhitlock/kuma,yfdyh000/kuma,yfdyh000/kuma,mozilla/kuma,yfdyh000/kuma,safwanrahman/kuma,yfdyh000/kuma,safwanrahman/kuma,SphinxKnight/kuma,ollie314/kuma,mozilla/kuma,ollie314/kuma,mozilla/kuma,Elchi3/kuma,jwhitlock/kuma,a2sheppy/kuma,Elchi3/kuma,ollie314/kuma,ollie314/kuma,Elchi3/kuma,a2sheppy/kuma,safwanrahman/kuma,Elchi3/kuma,a2sheppy/kuma,mozilla/kuma