Clearer maintenance notices in Client 1.1.63

Client Pack 1.1.63 includes UI 1.2.17. When the server disconnects you for planned maintenance, the menu explains what happened and directs you to Discord for the announcement that Ragnavik is live again.

Ordinary connection failures and mod-check rejections retain their own explanations. Shared gameplay mods are unchanged.

After the release announcement, install the complete Ragnavik Client Pack through Gale. Review the Known Issues page before updating.