NewServers creates a new Servers instance that holds only the given column number and its children.

gtk.ICON_SIZE_DIALOG.

Row represents a session row entry in the session List.

Servers wraps around a list of servers inherited from Children to display a Lister in its own box instead of as a nested list.

Controller extends server.Controller to add session parameters.

SessionController extends server.Controller to add needed methods that the specific top-level servers container needs.