function destroyManageDialog(oOverlay) {
		var oManageDialog = oOverlay.getElement().getManageDialog();
		if (oManageDialog && !oManageDialog.bIsDestroyed) {
			oManageDialog.destroy();
		}
	}
Constructor for a new ControlVariant Plugin.

@param {string} [sId] id for the new object, generated automatically if no id is given
@param {object} [mSettings] initial settings for the new object
@class The ControlVariant allows propagation of variantManagement key
@extends sap.ui.rta.plugin.Plugin
@author SAP SE
@version ${version}
@constructor
@private
@since 1.50
@alias sap.ui.rta.plugin.ControlVariant