Another small batch of fixes, including:
- You can now use any deck in campaign mode
- Filter buttons now change color when a filter is on
- Gassy Gnome is released. He's a 1/1 Cost 1 Alchemy creature with Volatile 1! What better way to answer that pesky armor?
- Ancient Guardian no longer gives 1 HP and 1 Mana for his first stat upgrade (it was never intended to give mana)
- Warsmith ability tooltip text is fixed
- Unholy Warcry bug is fixed - it no longer heals the creature when it would kill it
- Hero confirmation popup now has the appropriate icon