Battle window/log improvements

[Eaty]

@Anurag2006 Hey, the weather durations are more or less already on my to-do list.

The turns in the battle log are actually harder to do than it might look at first cause our battle code currently does not have turns per se.

 

@CruelGreenStatus turn will probably never be displayed. It's always hard to draw a line whether it should be in the client or not but I do not think it's the clients job to show this.

It's similar as showing super effective moves or even implementing the Showdown calculator in the client, possible but shouldn't be there.