Implemented major sub-task EXT-2250 - Implement Classifieds list in Picks panel.

indra/newview/llavatarpropertiesprocessor.cpp

indra/newview/llavatarpropertiesprocessor.h

indra/newview/llpanelpicks.cpp

indra/newview/llpanelpicks.h

indra/newview/llstartup.cpp

indra/newview/skins/default/xui/en/menu_picks_plus.xml

indra/newview/skins/default/xui/en/notifications.xml

...view/skins/default/xui/en/panel_classifieds_list_item.xml

indra/newview/skins/default/xui/en/panel_picks.xml