Enhancements to the built-in help

Version 1.61.0 contains some enhancements to the built-in help and some usability improvements:

• A new setting makes it possible to see a warning symbol next to help actions that will cause points to be lost. This setting can be found in the section “Layout & Appearance”. For more information about when the help is penalty-free and when it is not, please see the FAQ page on Help and scoring.
• When the help is used to “undo back to where I went wrong” or “clear mistakes only”, any combinations that have been deleted incorrectly are restored automatically. The ability to delete individual combinations can be turned on under “Optional Features” in the settings.
• When a square is tapped a second time, the square is no longer turned into a block if there are already two blocks in the same row or column. This is because it makes no sense to add a third block, if two are already present. This change might help to prevent squares from being filled inadvertently when a square is (re-)selected for the purpose of updating candidate values, or when tapping quickly between squares at the end of a game.
• Previously, if pencil mode was active and a square with pencil markings was tapped, the square would sometimes be converted to a number square with candidate values. This was the case when there were already two blocks in the same row or column. This was not very intuitive, so it no longer happens. Instead, the square now remains in pencilled state.