Add-on licensing: Active maintenance @ Vivid I18n

Key	English	Assigned screenshots	Actions
vivid.trace.addon-licensing.details.status.active-maintenance	Active maintenance	1	View
vivid.trace.addon-licensing.details.type.maintenance	Maintenance (support and updates) expires on {0}	1	View
vivid.trace.addon-licensing	${product.shortname} license information	3	View

Screenshot is shown to add visual context for all listed source strings.