More small improvements

Version 1.59.0 has some more small improvements:

• When the setting “Allow combinations to be deleted individually” is turned on, the space freed up by deleting individual combinations is better used for showing the remaining combinations. This will particularly benefit players who are playing large puzzles on small devices.
• When the leaderboard display style is set to “Top scores” (which is the default) and the player’s own score is outside the top 100, more scores from other players are now shown around the player’s own score. The leaderboard display style can be selected in the system settings for the Sumaddle app.
• The section of the introduction that was previously called “Tips” has been renamed to “Strategy”.