Man, I used to work for "XML Technology Center" and now I don't even remember what a valid element name was...

so don't preprend ${rootURL} .. thx alexlehm

I wasn't initially planning to do this, but it turns out more people needed this feature than I thought.

I left the text as is, but defined a mechanism to override this in the plugin, in a possibly context sensitive way. For example, a plugin can replace this text on a job-by-job basis, or by looking at some property/builder/etc.

the UI.

Also, for the core build, require that all the dependency licenses are
available.

- support invisible JobProperty

- simplifying Jelly view and submission handling

- support invisible JobProperty