Reset inactivity timer when an attack is blocked

[Kip]

I will start off by saying that receiving a hit on the shield is not something I want to see counting as activity.  A Royal Guard with good shields could go AFK for a very long time before having any chance of his shield breaking depending on which mode was being played.

Without getting into exact times for now, I believe we have a quite lenient system setup right now.  Adjustments to the timers have been made since 1.0.0 was first released after there were some initial problems with shielders being marked inactive too quickly.  Dealing damage is not the only way to show that you are active.  Using an anvil or health prop for instance is another simple way to prove you are still active.  Dealing some damage at the end of the wave when the last few bots are getting cleaned up is another option.

What I would like to know is whether this is currently an ongoing problem or whether this is just concern about what might go wrong.  If we get enough feedback and examples of how the current implementation of this feature is creating false-positives, we will look into a way of adjusting the system accordingly.