1. Open in editor a file.
2. Make some changes. Don`t save it.
3. Try to delete this in explorer.
4. "Are you sure?" question appears. Say yes.
5. "File is modified. Save it?" question appears. This is totally redundant. Of course I don`t want save file if I want delete it. But if you say yes two dialogs appear: "Save operation failed" and "F

ile is readonly".

[Libor] Now "Save?" question doesn`t appear but exception is thrown:

java.io.IOException: Shared access
	at org.openide.loaders.FileEntry.delete(FileEntry.java:83)
	at org.openide.loaders.MultiDataObject.handleDelete(MultiDataObject.java, Compiled Code)
	at org.openide.loaders.DataObject$2.run(DataObject.java:479)
	at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:414)
	at org.openide.loaders.DataObject.delete(DataObject.java:477)
	at org.openide.loaders.DataNode.destroy(DataNode.java:144)
	at org.openide.nodes.FilterNode.destroy(FilterNode.java:312)
	at org.openide.explorer.ExplorerActions$1.run(ExplorerActions.java, Compiled Code)
	at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:414)
	at org.openide.explorer.ExplorerActions$DeleteActionPerformer.performAction(ExplorerActions.java:385)
	at org.openide.util.actions.CallbackSystemAction.performAction(CallbackSystemAction.java:79)
	at org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:69)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1066)
	at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1101)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:378)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:250)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:226)
	at javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(BasicMenuItemUI.java:754)

	at java.awt.Component.processMouseEvent(Component.java, Compiled Code)
	at java.aw