Display active timer on browser tab & page header

[filcuk]

Is your feature request related to a problem? Please describe. N/A

Describe the solution you'd like Display that there's an active timer when user is not on timeline page, or maybe even not on the same browser tab.

Describe alternatives you've considered N/A

Additional context N/A

[jmattheis]

:+1:, I'll accept PRs for this feature.