Avoid news reloading on navigating between tabs

[steffenkleinle]

Is your feature request related to a problem? Please describe.
As a user it seems unnecessary and annoying that the news reload every time you navigate back and forth between the tabs.

Describe the solution you'd like
During an app session, no reload should happen (except manually triggered, e.g. by a pull to refresh).

Describe alternatives you've considered
N/A

Additional context
Add any other context or screenshots about the feature request here.