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.

data/feed.go

@@ -0,0 +1,42 @@
+package data
+
+import (
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/text"
+)
+
+// Activity is one entry of a feed.
+type Activity struct {
+	Icon       *pixel.Sprite
+	Text, Time string
+}
+
+type FeedOptions struct{}
+
+// Feed lists activity: icon, text and time, dotted apart.
+func Feed(c *ui.Context, entries []Activity, o FeedOptions) *ui.Element {
+	k := pixel.K(c)
+	return ui.Column(c).FillWidth().Children(func() {
+		for i, a := range entries {
+			last := i == len(entries)-1
+			ui.Row(c).FillWidth().Gap(k.D(6)).Padding(k.D(4), 0).Draw(func(p *ui.Painter, r ui.Rect) {
+				if !last {
+					g := k.Canvas(p, r)
+					g.Checker(0, g.H-1, g.W, 1, pixel.Edge)
+				}
+			}).Children(func() {
+				ui.Box(c).Size(k.D(12), k.D(12)).Shrink(0).Role(ui.RoleNone).Draw(func(p *ui.Painter, r ui.Rect) {
+					if a.Icon != nil {
+						k.Canvas(p, r).Sprite(0, 0, a.Icon, 0, pixel.Accent, 1)
+					}
+				})
+				ui.Column(c).Grow(1).Children(func() {
+					text.Paragraph(c, a.Text, text.ParagraphOptions{})
+					pixel.Text(c, a.Time, pixel.TextOptions{Slot: pixel.Faint})
+				})
+			})
+		}
+	})
+}