War prompting window, Heroes

It's just a minute change really. But I think it's neat, so this is what I think

During war when you are about to attack, you will be prompted with all your spells, troops, cc troops, and heroes availability.

See, there are only 2 heroes. Rather than making them disappear and make the cross (X) icon in the Heroes tab on all conditions when they are not available, how about:
- When they are recovering, give a green medic button, and grey them out. Put cross (X) icon in the Heroes tab
- When they are being upgraded, give a wrench button, and grey them out. Put exclamation mark (!) icon in the Heroes tab. This way players will know that their heroes are not available for war because it's being upgraded instead of still recovering.

"Dude that's your base you should know about your heroes' availability or not"
"This does not change anything related to clan wars"
I know, I know. But I just think it does not take that much effort, and besides it's quite nifty to have this kind of change :D