War boost improvements

Qwerty12345

In the last war, I had to pop extra I-boost because the fight loading screen took so long, that after 1 40 second fight my boost was already up.

Combine the frequent hangs on those screens with the higher PI, and 3 minutes isn't a very long time. This has already been acknowledged in higher tier wars by raising the fight time limit to 5 minutes.

I suggest either raising the fight time limit to 5 minutes to match and rebalance, or make it more of a "persistent charge" mechanic where you get it for your next 3 fights in that war... which might be 3 minutes apart, or might be the following morning when you enter the next section.