Description of problem:

joe wakes up once per second to do 2 things
1) check if the window changed size
2) update the clock

for 1) it already gets another signal, so that's redunant (after fixing a small
bug in it, see patch)
for 2), the clock updates only shows minutes, so waking up once per minute is
more than plenty for this.

The patch attached will fix both these issues; please consider inclusion