Usability improvements

Version 2.6.0 features some usability improvements and styling adaptions. The changes in detail:

• Each clue of a puzzle is now shown as having the shape of a button. This makes it more apparent that the clue values are also buttons. The shapes also help to indicate that a button is available, even when a clue value is hidden (in this case, the button can be used to fill gaps in the associated row or column).
• The new button shapes for clue values can be turned off in the settings, if preferred. The setting can be found in the section “Layout & Appearance” under the heading “Puzzle clues”.
• When the setting to “allow combinations to be deleted individually” is turned on, the clue value that is currently selected is shown highlighted with an underscore. This makes it possible to see, which clue the combinations relate to. This is of particular significance when there are multiple clues with the same value.
• A usability issue concerning the panel with number combinations has been addressed. This panel sometimes overlaps the button for pausing a button, especially if playing on a small screen. Previously, this meant it was quite easy to tap the pause button by accident when trying to delete individual number combinations. An invisible buffer zone around the panel now stops this from happening (the panel is simply hidden instead).
• The red filter is supported more comprehensively. It now works for all forms of popup interaction too.
• Popup dialogs for confirming an action work better with large text sizes. This applies to the reset and help buttons when a puzzle is in play and to the buttons for selecting the level of difficulty for a new puzzle in the context of the puzzle generator.
• When the puzzle generator is running in Keep It Simple or Normal play modes and an 8x8 or 9x9 puzzle is generated on demand with a target difficulty of Very Difficult, it is more likely that the target difficulty will actually be achieved.
• The settings popup features some styling adaptions for iOS 26.