Bug 137315 [Dialogs] Doubleclickable area to restore dialog size is often very small
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
Shell parent = getParentShell();
			if (parent != null) {
				Point parentLocation = parent.getLocation();
				shellLocation.x -= parentLocation.x;
				shellLocation.y -= parentLocation.y;
			}
			int strategy = getDialogBoundsStrategy();
			if ((strategy & DIALOG_PERSISTLOCATION) != 0) {
				settings.put(DIALOG_ORIGIN_X, shellLocation.x);
				settings.put(DIALOG_ORIGIN_Y, shellLocation.y);
			}
			if ((strategy & DIALOG_PERSISTSIZE) != 0) {
				settings.put(DIALOG_WIDTH, shellSize.x);
				settings.put(DIALOG_HEIGHT, shellSize.y);
			}
		}
	}
	/**
	 * Returns the initial size to use for the shell. Overridden
	 * to check whether a size has been stored in dialog settings.
	 * If a size has been stored, it is returned.
	 * 
	 * @return the initial size of the shell
	 * 
	 * @since 3.2
	 * @see #getDialogBoundsSettings()
	 * @see #getDialogBoundsStrategy()
	 */
	protected Point getInitialSize() {
		Point result = super.getInitialSize();