Is there way of controlling the tab order within the view window?
I see that it can be done in the View Categories and you can even create groupings to form a tree view, but that doesn't translate to the tab order in the window.
I'm really sorry but I believe I answered this already and I now see that your question is apparently unanswered (not sure if this is an issue with the forum or me getting old ). It's currently not possible to change the tab order of the views even though I agree that the View Categories toolbox suggests that. The categories in the tree are for navigation purposes and it's not currently possible to change the view/tab order.