Bug 137315 [Dialogs] Doubleclickable area to restore dialog size is often very small
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
/**
	 * Remove any mouse listeners that were registered.
	 * 
	 *  @since 3.2
	 */
	private void removeRestoreSizeMouseListeners() {
		Control dialogContents = getContents();
		if (buttonBar != null && !buttonBar.isDisposed()) {
			buttonBar.removeMouseListener(restoreSizeMouseListener);
			Control control = buttonBar.getParent();
			while (control != dialogContents && control != null && !control.isDisposed()) {
				control.removeMouseListener(restoreSizeMouseListener);
				control = control.getParent();
			}
		}
		if (dialogContents != null && !dialogContents.isDisposed()) {
			dialogContents.removeMouseListener(restoreSizeMouseListener);
		}
	}
	
	/**
	 * Restore the dialog to its initially computed size, resetting
	 * any bounds that may have been stored in dialog settings.
	 * 
	 * @since 3.2
	 */
	private void restoreDialogToComputedSize() {
		
		
		if (computedSize == null) {