The reference app resets a gradient to black and white when the
gradient button in the Tools panel is Cmd/Ctrl-clicked, and to the
default black and white linear gradient when the Gradient Fill box in
the Gradient panel is Cmd/Ctrl-clicked. In VectorCraft a Cmd/Ctrl-click
on either did what a plain click does, and the reset was only in the
Gradient panel menu.
A Cmd/Ctrl-click on the Gradient panel's thumbnail or on the Tools
panel's Gradient button now makes the gradient of the active Fill or
Stroke a linear gradient with the White, Black stops, through
paint.editGradient, as one undo step. A solid or no paint becomes that
gradient, and with nothing selected the default paint changes. A plain
click keeps its behavior, and the panel menu's Reset to White, Black
is unchanged.
Docs: docs/target-app-parity.md.