I have found the answer here:
http://community.jboss.org/message/630475#630475
These menu items were removed during work for
https://issues.jboss.org/browse/JBIDE-9009
The issue was
initialization of some core underlying libraries during the
convenience action. Unfortunately, after lots of investigation, the
root causes were never discovered and the only solution was to remove
the actions entirely, or, leave them in and allow some users to have
broken projects or workspaces throwing errors everywhere.
The decision was made to remove them.
The "workaround", or, the new way
to do it, is to simply use the .jar archive feature, and build out the
structure you wish to see.
The convenience actions really were not
as useful as we would have liked to begin with. Project archives is,
typically, used for non WTP-style projects. Because of this, we really
have no way at all to predict how the users project is structured. We
did some simple guess-and-verify work, but it was often wrong. Users
often found the guesses counterproductive, as they then had to go
remove invalid filesets, and add in new ones themselves. Combining
this with the initialization errors in JBIDE-9009, and it was not a
difficult decision to remove the conveineice actions.
