Switch to Godot 4.2b4 and updated panel container

.github/workflows/dev-desktop-builds.yml

@@ -13,8 +13,8 @@ on:
 
 env:
   GODOT_VERSION: 4.2
-  GODOT_SUB: beta3
-  GODOT_DOWNLOAD_DIR: https://github.com/godotengine/godot-builds/releases/download/4.2-beta3
+  GODOT_SUB: beta4
+  GODOT_DOWNLOAD_DIR: https://github.com/godotengine/godot-builds/releases/download/4.2-beta4
   EXPORT_NAME: material_maker
   MM_RELEASE: 1_4a1
 

material_maker/panel_container.gd

@@ -1,13 +1,15 @@
 extends TabContainer
 
+func _ready():
+	pass
 
 func _drop_data(_at_position, data):
-	var source : TabContainer = get_node(data.from_path)
-	var panel = source.get_tab_control(data.tabc_element)
+	var source : TabContainer = get_node(data.from_path).get_parent()
+	var panel = source.get_tab_control(data.tab_index)
 	source.remove_child(panel)
 	add_child(panel)
 
 func _can_drop_data(_at_position, data):
-	if data is Dictionary and data.has("type") and data.type == "tabc_element":
+	if data is Dictionary and data.has("type") and data.type == "tab_container_tab":
 		return true
 	return false