Add Packet navigation

Just a couple of handy operations:
 - Jump directly to a packet (a column containing
   the row number is added for simplifying this)
 - Go Back in the history of previously selected packets
 - Go Forward in the history of previously selected packets
 - Go UP/DOWN in the packet table (works when any component
   has the focus)

All these actions have received some global shortcuts, so that
keyboard-only navigation becomes a possibility.

All these actions were localized in the PacketsTable's ActionMap, which
the JMenuBar can access.
Replace textual enum desc with an lov

The enum description in the calibration column of the parameters
table is often very long. It makes it very hard for the user to
see all the possible values an enum can take.

This commit replaces that description with a link. Upon clicking
the link, a screen pops up with a table with all possible values
the enum can take. The actual value is pre-selected.