Pathbrowser - pattern property

[michal-ociepka]

There is no pattern property in the pathbrowser.js component. It would be good that we could take care of this regular expression feature there as well in the same way as it is in the textfield.

There is also a bug in the code OR in the documentation of pathbrowser.
Documentation:

• {Boolean}allowNonRootPath
• Allows a path that is not bound by the root path
• Defaults to false

but in the code we have:
allowNonRootPath = ns.utils.getDataAttribute(container, 'allownonrootpath', true),

I think that the code version is more correct and documentation part should be changed.

Thank you Nate - good job!