Next up is adding multisite.

[paaljoachim]

Check the multisite code in:
https://github.com/helenhousandi/wp-toolbar-experiments

Then check the code in:
https://wordpress.org/plugins/multisite-toolbar-additions/screenshots/

Multisite Toolbar Additions adds the prefix: Network Admin -> Plugins, Themes and Theme Editor to Network Plugins, Network Themes and Network Theme Editor.

• It also adds Network aware plugins to the list.
• It also adds Site Widgets, Site Menus, Site Plugins, Site Themes below a sub site drop down.

Also check out:
https://wordpress.org/plugins/wp-my-admin-bar/screenshots/