Onboarding · Help: help panel, cheatsheet, what's new, feedback, support, inline help

HelpPanel searches articles and opens one, its body in Markdown, with a
way back; focus follows to All articles and back to the search, a
link to help:<key> opens another, and Contact support and Keyboard
shortcuts wait at its foot. KeyboardShortcutCheatsheet puts
settings::KeyboardShortcutsList in a dialog with its search focused;
WhatsNewDialog puts data_display::Changelog in one with Got it.
FeedbackWidget asks how it is going with four faces and a note, and
thanks. ContactSupport sends a topic and a message, spins while the
owner sends, and empties the message with focus back in it. InlineHelp
is a quiet line with Learn more. HelpTooltip moves to primitives,
where FormLabel's help mark shows it; ToggleGroup keys its toggles by
its own id. EmptyStateWithAction points to feedback::EmptyState.

src/primitives/mod.rs

@@ -29,4 +29,4 @@ pub use layer::{Raised, raise};
 pub use measure::{IntersectionObserver, Measure};
 pub use pressable::Pressable;
 pub use severity::Severity;
-pub use tooltip::{Tooltip, TooltipTrigger};
+pub use tooltip::{HelpTooltip, Tooltip, TooltipTrigger};