Now that the pdf-viewer can be embeded (thanks for that btw, however still is hard to find for new users, I think it should be more visible--at least in the SVN 2939) I think that it would be useful to be able to move around the messages tab.
Maybe I want to see the messages only below the source, or maybe below both if the messages are big. Maybe I want to move them below the structure tree. If you allow mobility of the different tabs, it would be really nice.
Additionally, one can think about having a label that when gain focus it shows the message tab. I don't the name of this behaviour, but is similar to what the IDEs do when you have several tabs, and when you pass the mouse over they reveal them, later they allow you to pin the tab or to leave it as hiden and then showing it again.
Do you think all this is possible?