Undo the "change colour of message background" by default

[Vexthecollector]

Just updated and this was turned on by default. It made every message in chat unreadable.

Would be nice if this setting was turned off by default, because it can mess with some systems and make messages unreadable.

[esheyw]

As a workaround, you could force it off for everyone with force client settings or socket settings.

[p4535992]

A little to late, done on version 0.7.3