Added setting to indicate on the Playboard when 'Show Errors' is enabled.

[runs-with-scissors]

When the "Show Errors Indicator" setting is checked, and "Show Errors" is enabled, the color of each box's borderline is the 'errorColor'

[runs-with-scissors]

Screenshots

[gaul]

I dislike these jarring colors -- could we display a status icon next to the ellipses when the user has a wide screen like a tablet instead?

[runs-with-scissors]

@gaul wrote:

#152 (comment): I dislike these jarring colors -- could we display a status icon next to the ellipses when the user has a wide screen like a tablet instead?

Very good point. I now see how the colors would become distracting/annoying after a while. I think it makes sense to use a status icon for all devices, not just tablets.

Here are a few icons available from the Asset Studio which could work. I think the spellcheck icon would be a good fit for our use case (more optimistic than an error-related icon 😉)

[gaul]

Sounds good for tablets although phones have a limited space for the clue.

[runs-with-scissors]

Instead of adding a status icon, I decided to make it so that the change only applies to the currently selected word and not the whole grid. The red borderline wasn't noticeable enough in day mode, so I changed it to blue and increased its thickness