#111 Improving the File menu

[Jörn Zaefferer]

"Enter Directory" item is despensable and should be
removed.

"Open Directory URL" item needs some examples or some
help. The new context help system from Eclipse 3.2M5
might be useful:
http://download.eclipse.org/eclipse/downloads/drops/S-3.2M5-200602171115/eclipse-news-M5.html

"Open Location" is necessary as it opens a native file
system view. Some locations are only vailable through
this dialog. Leave it as an option as long as they are
not avaiable in the JC tree.

"Duplicate file or directory" item could also need
context documentation to explain the possibilty to use
relative paths (s. comment on "Open Directory URL" above).