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.
Handles resize one shape, so a selection of several shows its outline
and no handles; a press there no longer falls through to a marquee.
ToggleGroup wraps its faces when narrow, so the ToolPalette stays in a
280px box. A pen path left open ends when the tool changes: two points
or more go to the owner after the frame, a lone point is dropped, and
the open path paints only while the pen is the tool.
ZacharyZhang-NY