Bug fix: update balance onResume after balancing

In case the user exited out of an activity via a home button and the
balance was set to zero after the daily budget was balanced - it would
return to its' intended only after the Activity was recretated an after
being resume the value of balance would stay at 0.

Once again, this is due to the fact that the balance is manually set to 0
after the daily budget is recalculated. This is due to the precision
problem that must be fixed later.

- move the check for the daily budget was balanced to onResume().