ttools: adjust classpath order for stilts invocation script

Put stilts.jar first on the list of places the stilts invocation script
looks for the ttools classes.  Previously topcat-full.jar was earlier,
but if a stilts release is separate from a topcat one that may be
a bad choice.  Not quite sure why I did it the other way round to start
with, but I think this is better.
topcat: fix some regression bugs in row header

In topcat the TableRowHeader (grey row indices down the left hand side
of the JTable) were not getting updated properly under certain
circumstances, e.g. adding a column in the column window and resorting
the rows in the data window.  These used to work, but though related
were introduced in separate commits 8ceb3cb8 and da52b94e.

Fix them, including rewriting some nonsense code in TableRowHeader,
which was waiting for events from the wrong thing.