failure to copy files

[rob-miskimmin]

Expected behaviour

Copy Image files to project

Actual behaviour

Alert appeared on screen

Steps to reproduce

Try to drag Image folder containing image files into project

---

Build time	2024-05-15T15:14:00.109381
Defold channel	editor-alpha
Defold editor sha	c992588
Defold engine sha	9141d9d
Defold version	1.8.0
Error	2b02ec76e0664087aeb4f7611ef94740
GPU	Apple M2
GPU Driver	2.1 Metal - 88
Java version	17.0.5+8
OS arch	aarch64
OS name	Mac OS X
OS version	14.4.1

[AGulev]

com.sun.glass.ui.View$2.flush.class java.lang.UnsupportedOperationException: Flush is forbidden from target!
    at com.sun.glass.ui.View$2.flush(View.java:1017)
    at com.sun.javafx.tk.quantum.QuantumClipboard.flush(QuantumClipboard.java:275)
    at com.sun.javafx.tk.quantum.QuantumToolkit.startDrag(QuantumToolkit.java:1326)
    at javafx.scene.Scene$DnDGesture.dragDetectedProcessed(Scene.java:3171)
    at javafx.scene.Scene$DnDGesture.process(Scene.java:3240)
    at javafx.scene.Scene$MouseHandler.process(Scene.java:4003)
    at javafx.scene.Scene.processMouseEvent(Scene.java:1893)
    at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2711)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:411)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:301)
    at java.security.AccessController.doPrivileged(AccessController.java:399)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:450)
    at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:430)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:449)
    at com.sun.glass.ui.View.handleMouseEvent(View.java:551)
    at com.sun.glass.ui.View.notifyMouse(View.java:937)
    at com.sun.glass.ui.mac.MacView.notifyMouse(MacView.java:127)
    ```

[AGulev]

duplicate of #5875