Improvements and fixes

A plant's analysis tabs now show how many of their components are out of action.

• Each device tab in a plant's analysis now shows how many of its components are out, and its events column also lists closed events.
• Switching from one plant to another no longer gets stuck.
• Series hidden in a graph's legend no longer stay hidden when another plant is opened.
• Saving a network device's details or credentials no longer waits for the plant to answer and confirms at once.
• A plant's remote-access figures no longer read zero for a connection that a site dials into.
• Cooperation notices now name who declined or withdrew an invitation, and a change to a user's access is now announced.