Make patrons visible when entering editor.
Make patrons visible when entering editor.

This sets the patrons to be visible in the EditorEvent event
handler.

Tested: On Linux. Enter editor, observe all patrons, exit editor,
observe only one patron.

Change-Id: Ia4da47d7cc12478f950680b6efa5580f3fbcddd6

google/zooshi,google/zooshi,google/zooshi,google/zooshi,google/zooshi