Use ShellEntry.addContextMenu() to add context menus to most
existing entries, with the exception of:
- the login dialog - it may act be used to enter either the
username (e.g. no password entry) or the
password, and copy/paste does not make sense
(nowhere to copy from, nowhere to paste to)
- notifications - while adding a context menu is useful here as
well, it will require changes to the tray's
focus grab handling, so leave those entries
out for now
https://bugzilla.gnome.org/show_bug.cgi?id=659275
9439da81c4