Popup Panel Desync in ModularSyncManager

[ghzdude]

When opening a popup panel, then opening a recipe in JEI, then going back out of JEI, the ModularSyncManager becomes desynced,

The popup panel exists in the psm map on the server, but does not exist in that map on the client.
The panel history contains the panel on both sides.
Both of these facts cause server packets to be silently dropped and unread.

Meaning if you have a button on the main panel to close said popup panel, it won't work because it thinks the panel is closed on the client and tries to open it, and attempts to send a packet to the server that gets completely ignored.

[brachy84]

In my testing, the sync managers are properly closed on both sides, but are not reopened when going back to the ui on both sides.