Revengeable shield countdown and shorter shield time

[voodoogolfer]

I'd like to see a countdown ticker for when a players shield will expire if they are available for revenge. With leaving their Town Hall out, people with huge resources storages end up getting sniped by someone trophy hunting and you never get a chance to revenge. Having a countdown would give you a shot to know when it's possible to attack.
Also, I'd suggest shorter shields when all that was attacked was the townhall to help circumvent this tactic.

[Aleksander]

I believe this is too close to "indicate last online time" which is ruled out. This would be a tad unfair so I say no