A few more small improvements

Version 1.61.1 is an update to version 1.60.0, mainly to correct (increase) the size of overlay sheets when running on iPads with iPadOS 18. Overlay sheets are used for temporary presentations, such as for the settings.

Other small improvements included in this update:

• When the option to show inverted combinations has been turned on in the settings and a group of squares outside the blocks of a row or column is selected using a swipe (drag) gesture, the inverted combinations are shown. Previously, this was only the case if all the squares outside the blocks were selected together, now it is the case for any group of squares that are selected in this way.
• When a row or column has a hidden clue and the space is tapped where the clue would normally be shown, any combinations that are already showing are immediately hidden. This is a revision to a change made in version 1.57.0.