Ctrl/Cmd+Shift-clicking New Swatch in the Swatches panel opened New
Swatch for a spot color, as a Ctrl/Cmd-click does. It now opens the
dialog for a global process color, and with Alt also held it saves one
at once. `ui.newSwatch` takes `global`.
An Alt+Ctrl/Cmd-click with a gradient or pattern as the active paint
failed with "spot, mode and group apply to solid colours only". It now
saves a gradient or pattern swatch, as a Ctrl/Cmd-click does through
the dialog.