Small harmfull patch

	Hi,

As I was coding to add popup menu to my new view, I got a look at
task_tree_tree_view_button_press_event (file
srv/view/gantt/mg-task-tree.c), to try to understand how it works.

I guess that the numbers, instead of "actions" can be replaced by
the POPUP_XXX equivalent, which would make the code easier to read and
more consistent in case one add/remove a menu entry... Am I right at it?
As I cannot commit stuff, I just send you this e-mail to remember about
it...

Regards,

	Benjamin.