ExecuteFunction won't work with non-button controls in Office Web Add-in manifests

Although  explicitly stated in official Microsoft Office web add-in docs that a function in FunctionFile.js may be called by both a button and a menu item control, it turns out that, at least with the latest Chrome based version of the Edge web control implementing the task pane, only button controls are actually able to invoke functions using the ExecuteFunction add-in manifest clause.