Enhancements to Dark look

Version 2.10.0 includes some enhancements to the Dark look, along with some small fixes and enhancements.

• When the Dark look is selected in the settings, it is now possible to choose whether the background for blocks is solid black or a lighter level of shading. When lighter shading is used, the other squares of the puzzle have a darker appearance.
• The option for blocks to be painted with a special fill effect has been extended to the Dark look too. Fill effects for blocks were introduced in the previous app version in connection with the new Extra Dark look.
• Improved the way the puzzle generator picks up the latest score from the leaderboard when returning to the app after a period of inactivity.
• Fixed an issue with updating the leaderboard for the puzzle generator after playing offline. The points earned offline were sometimes not being added to the leaderboard correctly.
• Fixed an issue where the page of settings for the puzzle generator was sometimes missing from the settings popup. This was happening if the settings popup was brought up while a puzzle was in play.
• If the squares between two blocks are selected using a swipe (drag) gesture, the selection can be inverted by tapping the corresponding clue value. This switches the selection from the squares inside the blocks to the squares outside the blocks. This was already possible before, but sometimes it would work with one tap, other times it took two. It now works consistently with just a single tap.
• A haptic effect is no longer triggered when multiple squares are selected using a swipe (drag) gesture.
• Some small cosmetic changes, including improvements to contrast ratios for the squares and numbers of a puzzle in play.