in almost all cases where ItemTranslator is used, an Item already exists, so it doesn't make any sense to make ItemTranslator go and create another item instance just to pass to ItemSerializer.
fixes#5021 and probably a bunch of other inventory related glitches
When the server initiates a window close, it does so by sending a ContainerClose to the client, which causes the
client to behave as if it initiated the close itself. It responds by sending a ContainerClose back to the server,
which the server is then expected to respond to.
Sending the client a new window before sending this final response creates buggy behaviour on the client, which
is problematic when switching windows. Therefore, we defer sending any new windows until after the client
responds to our window close instruction, so that we can complete the window handshake correctly.
This is a pile of complicated garbage that only exists because Mojang overengineered the process of opening and
closing inventory windows.
I previously avoided this due to being unsure of the effects; however, it's clear that we already use typed properties on Threaded things in other places anyway, and the only known issues are with uninit properties, and arrays.
the current data management system uses case-insensitive names, so we can't allow different players with the same name in different cases to join, or we will have duplication exploits.
This typically only applies to offline servers, since Xbox Live doesn't permit reuse of a username, same case or otherwise.
closes#4965
