Update BukkitCommandContexts.java

[casperwtf]

The point of this is to add better support for geyser since it will first check if it can match an online player with that name.

[chickeneer]

I have never used geyser. But I can't figure out why this would improve geyser support.

I am looking at getOfflinePlayer() and it already calls getPlayer() as one of the first thing it does. The exception is the string based version uses getPlayerExact - not the getPlayer variation.

I think I am lacking information to make this change.