The bulk of this commit originally came from David B. Cortarello's
patch (see here - https://gitlab.com/o9000/tint2/issues/430), with me
adding the up/down mousewheel elements.
Under Openbox the middle-click is normally used to display the Openbox
menu and the mousewheel to switch desktop. So I needed to modify tint.c
in order to prevent openbox intercepting the new actions.
This commit creates the following new configuration settings :-
clock_mclick_command
clock_uwheel_command
clock_dwheel_command
e84d963ab6