bunch of fixes and changes done

inv_system/trash_slot.gd

@@ -0,0 +1,17 @@
+extends PanelContainer
+
+@export var slot : ItemSlot
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass
+
+
+func _on_button_pressed() -> void:
+	slot.item = null
+	slot.update_ui()