Colours from item custom names leak into /give output

[dktapps]

Issue description

Since the formatting codes from Item->getName() are not contained when embedding them into the translations, this happens:

In this image, only the Legendary part should be grey. The rest of the message should be white.

This is likely a problem in other areas too, and it's rather inconvenient to fix in versions prior to the introduction of TextFormat::addBase(), so this probably won't be fixed until after 4.11.

Steps to reproduce the issue

1. /give yourself an item whose custom name contains formatting codes
2. Notice that the remainder of the audit message after the item name is the same format and colour as the item name itself

OS and versions

• PocketMine-MP: 4.9.1 / 5.0.0-ALPHA4