Feature Request: improvement of address books

[Mhalkyo]

I am currently studying the Rustdesk Server Pro solution with my company. Some points have been noted about the address books, that's why I am making a proposal to add some improvements to the address books:

• Improved search: Currently the search only works based on the group name, what would be interesting is to be able to perform a more general search across all groups. For example to search for a specific server. It would be to have a more global view with all the devices in the groups at the same time and the view that we currently have with only the groups.

• Automatic sharing of address books: Add an option to directly share the group created in the shared address books. Cela permettrait de gagner du temps.