Port friends list improvement from catznip

indra/newview/app_settings/settings.xml

indra/newview/llavatarlist.cpp

indra/newview/llavatarlist.h

indra/newview/llavatarlistitem.cpp

indra/newview/llavatarlistitem.h

indra/newview/llpanelpeople.cpp

...iew/skins/default/textures/icons/Permission_Ungranted.png

indra/newview/skins/default/textures/textures.xml

...newview/skins/default/xui/en/menu_people_friends_view.xml

...a/newview/skins/default/xui/en/panel_avatar_list_item.xml