Configurable mStream display in toolbar would be good for everyone

I would like some configuration options for the mStream shown in the toolbar. A longer duration for messages would be nice -- as it is, I usually barely catch the update in time to read part of it and not enough time to enjoy it.

I also would like it if the latest mStream update could stay in the toolbar -- the last thing received on twitter, for example.

These seem like the sort of customizations (duration and continued display of latest update) that would allow a lot of users to make the Minggl bar a lot nicer for their individual tastes.

Thanks for the good work!