Add data components 151-175; clear MyGo row highlights

Lists, tables, trees, grids, inventories and records in data/.
Outline and GridView build on ui.List: ui.Outline strokes its arrows
and ui.GridView spaces and tints items. The pixel theme keeps MyGo's
row highlights clear so scrolled rows stay on whole dots; off lists
take a veil against the wheel. Adds Canvas.Silhouette, SwitchOptions
Label and exports Rarity.Slot.

input/form_test.go

@@ -221,3 +221,14 @@ func TestGridCopyFollowsTheLocale(t *testing.T) {
 		t.Fatal("END or the unlock banner ignores the locale")
 	}
 }
+
+func TestSwitchLabelNamesABarePlate(t *testing.T) {
+	lever := false
+	tt := view(300, 100, nil, func(c *ui.Context) {
+		input.Switch(c, "", &lever, input.SwitchOptions{Label: "Fly"})
+	})
+	click(t, tt, "Fly")
+	if !lever || len(tt.Texts()) != 1 {
+		t.Fatalf("switch %v, texts %q", lever, tt.Texts())
+	}
+}

input/switch.go

@@ -10,6 +10,8 @@ import (
 
 type SwitchOptions struct {
 	Disabled bool
+	// Label names it for assistive technology; zero uses text.
+	Label string
 }
 
 type SwitchResult struct {
@@ -20,7 +22,7 @@ type SwitchResult struct {
 // Switch is a lever on an OFF/ON plate.
 func Switch(c *ui.Context, text string, on *bool, o SwitchOptions) SwitchResult {
 	k := pixel.K(c)
-	shell, base, st := pixel.Shell(c, func() *ui.Element { return ui.SwitchBase(c, on).Label(text).Disabled(o.Disabled) })
+	shell, base, st := pixel.Shell(c, func() *ui.Element { return ui.SwitchBase(c, on).Label(label(o.Label, text)).Disabled(o.Disabled) })
 	shell.Size(k.D(32+pixel.Measure(text)), k.D(pixel.LineHeight)).Draw(func(p *ui.Painter, r ui.Rect) {
 		g := k.Canvas(p, r)
 		g.Frame(0, 1, 27, 14, pixel.Raised, pixel.Shade)