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I right click on a Java package in a Web Project and create a new "HTML" element with Location = "Source Packages". The problem is that "Folder" defaults to an empty String. I am expecting Folder to be prepopulated with the Java package I right-clicked on. Maybe there is a better UI approach (feel free to innovate) but you get my point :)
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss