Adjust style for field elements
Add more field elements
Update `Display` to handle new field design

Update `Display.getFieldData()` to accept an argument specifying which
side attacks.
Also add handlers to field input elements
Update `Calc` and `Data` for field input.

Update weather and helping hand in `Data.FieldEffects()`
Add Spread and Weather modifiers for `Calc.getDamageNumbers()`