It would be useful if when your current version of Jenkins is 2 or more versions behind the latest released version (e.g. 2.15 -> 2.18) to be able to select (under the Upgrade Automatically Button on the Manage Jenkins page) to be able to select which version you want to upgrade to. (in the above example: a drop down list containing 2.16, 2.17 and 2.18).