Shuffling the keyboard removes formatting of invalid word

[afh]

Steps to reproduce

• Start wordle, e.g. wordle day 0
• Type an invalid word, e.g. BLARG
• Verify that the typed invalid word is displayed on a red background
• Press , to shuffle the keyboard

Expected behaviour

• The keyboard is shuffled
• The invalid word is displayed on a red background

Actual behaviour

• The keyboard is shuffled
• The invalid word is displayed on the default terminal background, i.e. red background is removed

Unfortunately my rust knowledge is too limited to quickly propose a fix for this.

[afh]

Closing as the fix proposed in #16 has been merged.