CT-575 WIP l10n catchup with set15 translation for Viewer 2.1, part 2/2

indra/newview/skins/default/xui/de/panel_people.xml

indra/newview/skins/default/xui/it/floater_camera.xml

indra/newview/skins/default/xui/it/menu_inventory.xml

indra/newview/skins/default/xui/it/menu_inventory_add.xml

indra/newview/skins/default/xui/it/menu_viewer.xml

indra/newview/skins/default/xui/it/panel_nearby_media.xml

indra/newview/skins/default/xui/it/strings.xml

indra/newview/skins/default/xui/ja/floater_camera.xml

indra/newview/skins/default/xui/ja/menu_inventory.xml

indra/newview/skins/default/xui/ja/menu_inventory_add.xml

indra/newview/skins/default/xui/ja/menu_viewer.xml

indra/newview/skins/default/xui/ja/panel_nearby_media.xml

indra/newview/skins/default/xui/ja/strings.xml