jobs: fix countdown skew (#547)
jobs: fix countdown skew (#547)

Apparently the timer icon (but not any other timer types) was
setting a timeout and then advancing the value by that timeout,
which would cause clock skew.  Instead, record the start time
and modify the value to only be relative to that start time.

Fixes #547.

quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot,quisquous/cactbot