Show the branching structure in the log.

[oakmegaeddie]

Is your feature request related to a problem? Please describe.
It can be useful seeing the branching/merging structure in the log view, in a similar way to git log --oneline --decorate --graph

Describe the solution you'd like
The graph view visible in the log window.

Describe alternatives you've considered
I haven't got any other alternatives other than not doing it. :-)

Additional context
The issue #81 has been closed and marked wonfix by the bot, therefore I copy the content and create a new issue here.

[extrawurst]

Let's keep track of this in the old ticket, since we link that from the roadmap in the reader already.