+1
The Sneak Attack Icon should be greyed out if a sneak attack cannot be made.
Furthermore, if you miss on your Sneak Attack and you have a remaining attack, you should be able to use Sneak Attack on that attack (per 5e rules).
Finally, all attacks of opportunity made by rogues should by default be sneak attacks if the appropriate criteria are met (again, per 5e rules).
All this would be solved if sneak attack was applied automatically instead of being a dedicated icon, but I prefer being given the option to sneak attack with your main or off hand instead of it applying on the first successful hit.
