Ability to export / import app configuration

[qorron]

The app has a lot of configuration options which all have to be set up correctly for everything to work out.

I'm currently in the process of moving to a new Android phone and I seem to be unable to move the configuration from the old device to the new one without entering everything anew. Which is of course an error prone process.

Being able to export the config on the old device and import it on the new one would help a lot.

[ostrya]

I'll have a look at it when I have some time.