[BUG] Counting time left should continue even when NeedABreak is suspended

[bNobo]

Describe the bug
Scenario :

1. Set auto-suspend ON
2. Set delay to 90 minutes
3. Make a visio-conference call or watch a video (the application is suspended during this time)
4. After some time, let's say one hour stop the video and go back to work

=> Because the timer was suspended during one hour, I still have to wait 90 minutes before the application prompts me to move. The total time before notification will be 150 minutes which is too much. Even if I was inactive I was in front of the screen.

Expected behavior
The notification should not be sent because I don't want to be interrupted when the application is suspended but the timer should continue. For instance if the delay is 90 minutes and I watch a full screen video during one hour, I should be prompted to move 30 minutes after stopping the movie. If the movie last for more than 90 minutes, I should be prompted immediatly after stopping the movie.

[bNobo]

#92 will fix that