New features and bugfixes

Updated game and implemented features:

• [Feature] Added Hint-button which will solve the game (if possible) and make the first move towards the found solution, if no solution from current state is found it will go back to the last state of game where a solution is possible and make the move.
• [Feature] Added Reset-button to reset to the start of the current game
• [Feature] Added possibility of specifying the capacity of the containers between 3-10 (default is 4)
• [Bugfix] Fixed a bug where having a ball selected and switching the level kept the ball stuck on the board instead of deleting
• Reduced the amount of levels due to the solver behind the Hint-button taking too long to solve above like 10-12 containers
• Added a level 0 with only two containers filled (very easy level)