ok. i'm seeing two things here that are not the behavior i would expect.

when: treeview visible && treeview focused
running treeview: toggle

• hides the treeview. -> good
• maintains focus on treeview even though it is hidden. -> weird

expected behavior: running the CLOSE command on a FOCUSED treeview
would close the treeview && move focus to the previous view

when: treeview not visible
running treeview: toggle-focus

• moves focus to treeview. -> good
• does not make treeview visible. -> wierd

expected behavior: running the FOCUS command on a HIDDEN treeview
would open the treeview && move focus.

i am getting this behavior running a bin of 'master'

maybe this is just me? i don't think there should be any reason to have focus on a hidden view