Added log errors option for async display

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/display/PacketWindowItems.kt

@@ -51,7 +51,9 @@ class PacketWindowItems(plugin: EcoPlugin) : AbstractPacketAdapter(plugin, Packe
                 try {
                     modifyWindowItems(itemStacks, windowId, player)
                 } catch (e: Exception) {
-                    // Don't do anything, just accept defeat
+                    if (this.getPlugin().configYml.getBool("async-display.log-errors")) {
+                        this.getPlugin().logger.warning("Error happened in async processing! Disable async display (/plugins/eco/config.yml) if this is a frequent issue")
+                    }
                 }
 
                 val newPacket = packet.deepClone()

eco-core/core-plugin/src/main/resources/config.yml

@@ -51,6 +51,9 @@ async-display:
   # If async display should always be used.
   enabled: false
 
+  # Log errors that occur in async processing.
+  log-errors: true
+
   # If the server is running under heavy load (below a certain TPS value), enable
   # async display automatically. This can prevent some server crashes under load.
   emergency: