Ref T12174. This fixes more bugs than it creates, I think:

• Dashboards now show the whole menu.
• Project and home items now show selected state correctly.
• The "choose global vs personal" thing is now part of MenuEngine, and the same code builds it for Home and Favorites.
• Home now handles defaults correctly, I think.

Maybe regression/bad/still buggy?:

• Mobile home is now whatever the default thing was, not the menu?
• Title for dashboard content or other items that render their own content is incorrectly always "Configure Menu" (this was preexisting).

• Created, edited, reordered, disabled, deleted and pinned personal and global items on home, favorites, and projects.
• Also checked User profiles.