Mentioning profile in draft: manually added domain not part of handle

[realpixelcode]

When mentioning another user in a new post and manually adding the server domain (for example because the app didn't suggest the correct profile), then the domain is not displayed as part of the account handle.

Also, the suggestion stops as soon as you enter the second @ symbol.

https://user-images.githubusercontent.com/52963327/187028151-7c3d5271-05ab-4827-9121-17bb082ea6d2.mp4