overview not refreshed after a command line stop

Created by: ederag

Overview is not refreshed after a command line stop. With Python 3.6.5 on openSUSE Leap 15.0.

To reproduce: It should be fine, but if you are using hamster-time-tracker, make sure to backup your hamster.db first.

1. pkill -ef hamster
   src/hamster-service &
   src/hamster-windows-service &
   src/hamster-cli

2. create an ongoing fact in overview.
3. on another terminal, src/hamster-cli stop The overview is not updated.

Here is snapshot 3245adbdbd85c7b4ee6c5ac93a0cf05132555968, showing the origin of this bug: Despite the assignment, self.facts is still bound to the old self.facts list.

A forthcoming PR is hopefully solving it.