Distribution/Version: ubuntu breezy

Hello and many thanks for making and sharing very good software!

There doesn't seem to be a way to expand or collapse directories using only the
keyboard in the new spatial treeview. 

The only way to do this that I have found is to click the little arrow to the
left of the folder-icon, which is sort of slow.

One possible place for this might be a expand/collapse in the the upper segment
of the right-click menu and the second upper segment of the file menu. 

The right and left arrow buttons seems to make sort of sense, since browsing the
spatial tree view has a twodimensional feel to it already.

Have fun!