Fix name of event-inv being wrong

[sovdeeth]

Problem

on inventory open:
  broadcast name of event-inventory
  wait 1 tick
  broadcast name of event-inventory

name is always "crafting" even if you currently have a gui open and you open another one on top
if you wait a tick its fine
!open new chest inventory named "abc" to all players
!open new chest inventory named "abcd" to all players
Crafting
abc
Crafting
abcd

Solution

Adds a default convert(event, T) method to the expression property handler so expressions can override behavior for event-specific values.

Testing Completed

Manual confirmation

Supporting Information

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Completes: none
Related: none
AI assistance: none