Patch: disable poke status when connection is not available

[Jose Dapena Paz <jdapena igalia com>]

	Hi,

	This patch disallows poke status operation when connection is not
available. Should avoid getting one poke per folder that should be
serialized if connection is not available.

Changelog entry:
	* libtinymail-camel/tny-camel-folder.c:
	Now poke_status only tries to do the job if folder is
	connected/active. Should prevent getting lots of attempts to
	connect in queue that have to be finished later.

-- 
Jose Dapena Paz <jdapena igalia com>
Igalia