Incorrect Zoom Level Applied When Dragging

When dragging and dropping a file from the Package Explorer or a
field/method from the Outline view, the dragged item appears at an
incorrect zoom level. Thats because the zoom for DragSource was not
updated on zoom change and we use that zoom in DragListener to update
the size of the imageList.

Author: ShahzaibIbrahim

bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/DragSource.java

@@ -380,9 +380,15 @@ public DragSource(Control control, int style) {
 				DragSource.this.drag(event);
 			}
 		}
+		if (event.type == SWT.ZoomChanged) {
+			if (!DragSource.this.isDisposed()) {
+				this.nativeZoom = event.detail;
+			}
+		}
 	};
 	control.addListener(SWT.Dispose, controlListener);
 	control.addListener(SWT.DragDetect, controlListener);
+	control.addListener(SWT.ZoomChanged, controlListener);
 
 	this.addListener(SWT.Dispose, e -> DragSource.this.onDispose());