Try in FormWidgetExampleForms
Removed the style as it is creating a block in UI, instead of that input type hidden should be used. As this field is used to achieve internationalization.
Now the tab will work properly and tooltip will be shown in input box.
Thanks Jacques for creating the issue and Thanks Jagpreet for the patch contribution. Changes are committed in trunk at r1724975.
Good Stuff guys, backported in R15.12 as well at r1725024