This commit removes and replaces all the old methods 'on_*' by settings
with the same name. The old methods were renamed into more explicit names that can be used for the callbacks like "next_song","mute" etc...
For instance, you can test with:
status.register("clock",
format=[
("Format 0",'Europe/London'),
("%a %-d Format 1",'Europe/Dublin'),
"%a %-d %b %X format 2",
("%a %-d %b %X format 3", 'Europe/Paris'),
],
on_leftclick= ["urxvtc"] , # launch urxvtc on left click
on_rightclick= ["scroll_format", 2] , # update format by steps of 2
log_level=logging.DEBUG,
)
This way much code could be removed from other modules, though I did it only for the clock module here.
