Removing host from group unnecessarily complicated

Instead of having to edit the group, you could just have a button "Remove from Group" at the top of the host list (when a group is selected in the left pane) (OME 3.1)

Edit/Update: I realize this action might be carried out less often during normal usage. It's more useful during initial setup when playing with groups. It might be worth adding it to "More Actions" and not as a button on the main screen.