Add column for hg phase

It would be very useful to be able to see the phase of a changeset in the log view - both as a column in the graph as well as a row in the changeset details view (left pane right below graph view).

This would make it much easier to see which changes I've pushed and which I have not. Right now I have to either go to the command line or open the Push view, both of which take time and are out-of-band with my normal log browsing workflow.