tmf.ui: Move TmfEventsTable listeners from anonymous to nested classes

tmf.ui: Move TmfEventsTable listeners from anonymous to nested classes

The listeners are pretty big and make the code harder to read. This patch
puts them together at the top of the file so that the constructor is simpler.

Change-Id: Ib0ab2d86afec4a26eb725556eb52e046b6b7850f
Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/45464
Reviewed-by: Hudson CI
Reviewed-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
Tested-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>