QwixxScore

Allows to handle Qwixx game scoring instead of using paper.
Several options and extensions :
- support of Qwixx mixed extensions (colors and numbers variants)
- support of Qwixx connected extensions (steps and chain variants)
- support of Qwixx Double extensions (A and B)
- Dark theme colors
- Possibility to hide the current score
- Possibility to end the game once 3 rows have been locked instead of 2
- Possibility to unlock "12" or "2" cells once 6 numbers have been checked instead of 5

Recent changes:
Improved display for Qwixx Double A variant