Hotfix. Christmas event

- Spawn of "Snowdrifts" has been increased by 1.5 times around the world.
- Now in a "Christmas sock" at a time you can put 10 snowflakes instead of 1.
- Bug fixed, when you can't get a gift from Christmas tree if the second and subsequent times to decorate it.
- Bug fixed, where when receiving gifts from the Christmas sock, some items did not have quality.