Changed "ipattern" to "pattern" in all .properties files

Added:

• Invalid number

• Invalid symbol

• Custom amount

• Next page

• Back

• Max Rounds

• Survival Mode

• Arrow pickup

• Item drops

• Absolute projectiles

• Auto Ignition

• Show Health

Updated:

• # (Number Input)

• Rain

• Worldborder Time

• Enderpearl Cooldown

First version!