Fix Window not set as parent of GUI after reopening

Author: NichtStudioCode

invui-core/src/main/java/xyz/xenondevs/invui/window/AbstractMergedWindow.java

@@ -24,8 +24,6 @@ public abstract class AbstractMergedWindow extends AbstractDoubleWindow {
     public AbstractMergedWindow(Player player, ComponentWrapper title, AbstractGui gui, Inventory upperInventory, boolean closeable) {
         super(player, title, gui.getSize(), upperInventory, closeable);
         this.gui = gui;
-        
-        gui.addParent(this);
     }
 
     @Override

invui-core/src/main/java/xyz/xenondevs/invui/window/AbstractSingleWindow.java

@@ -32,8 +32,6 @@ public AbstractSingleWindow(Player viewer, ComponentWrapper title, AbstractGui g
         this.gui = gui;
         this.size = gui.getSize();
         this.inventory = inventory;
-        
-        gui.addParent(this);
     }
 
     @Override

invui-core/src/main/java/xyz/xenondevs/invui/window/AbstractSplitWindow.java

@@ -27,9 +27,6 @@ public AbstractSplitWindow(Player player, ComponentWrapper title, AbstractGui up
         super(player, title, upperGui.getSize() + lowerGui.getSize(), upperInventory, closeable);
         this.upperGui = upperGui;
         this.lowerGui = lowerGui;
-        
-        upperGui.addParent(this);
-        lowerGui.addParent(this);
     }
 
     @Override

invui-core/src/main/java/xyz/xenondevs/invui/window/AbstractWindow.java

@@ -261,6 +261,7 @@ public void open() {
         hasHandledClose = false;
         initItems();
         WindowManager.getInstance().addWindow(this);
+        for (AbstractGui gui : getGuis()) gui.addParent(this);
         openInventory(viewer);
     }
 
@@ -330,9 +331,8 @@ private void remove() {
                     ((SlotElement.InventorySlotElement) slotElement).getInventory().removeWindow(this);
                 }
             });
-        
-        Arrays.stream(getGuis())
-            .forEach(gui -> gui.removeParent(this));
+
+        for (AbstractGui gui : getGuis()) gui.removeParent(this);
     }
 
     @Override