Add account components 386-405; Reduce setting, PinInput Cmd+V

Twenty account components: SettingsList, OptionCycler, KeyBindings,
ControllerMap, ProfileCard, CharacterCreator, LoginForm, PasswordGrid,
SessionList, LanguagePicker, PalettePicker, VolumeMixer,
DifficultySelect, AccessibilityOptions, AccountSwitcher, PlayerSelect,
TwoFactor, About, PatchNotes and FeedbackForm.

The components never check credentials, and no secret reaches the log:
LoginForm reports Submitted and the caller counts Failures; each new
failure clears the password, refocuses it, shakes the form and names no
field. TwoFactor builds on input.PinInput and drains an epoch-aligned
period bar. PalettePicker draws each tile in its own palette on a
pixel.Pad grid.

pixel.Settings.Reduce stills motion like the system preference, the
micro font gains '?', display.Face draws avatar faces anywhere, and
input.PinInput pastes on Cmd+V as native hosts send it.

account/languagepicker.go

@@ -0,0 +1,46 @@
+package account
+
+import (
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/data"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+// Language is a tongue by its own name, flagged.
+type Language struct {
+	Name string
+	Flag *pixel.Sprite
+}
+
+type LanguagePickerOptions struct {
+	// Width and Height are dots; zeros mean 160 by 120.
+	Width, Height int
+	Disabled      bool
+}
+
+type LanguagePickerResult = data.ListResult
+
+// LanguagePicker lists languages with flags; ▶ marks the chosen one.
+func LanguagePicker(c *ui.Context, text string, langs []Language, chosen *int, o LanguagePickerOptions) LanguagePickerResult {
+	k := pixel.K(c)
+	choice("LanguagePicker", chosen, len(langs))
+	var res LanguagePickerResult
+	ui.Box(c).Width(k.D(pixel.Or("LanguagePicker Width", o.Width, 160))).Children(func() {
+		res = data.List(c, text, len(langs), chosen, data.ListOptions{Height: o.Height, Disabled: o.Disabled}, func(i int) string { return langs[i].Name }, func(i int) {
+			l := langs[i]
+			ui.Row(c).Gap(k.D(4)).AlignItems(ui.Center).Children(func() {
+				if l.Flag != nil {
+					ui.Box(c).Size(k.D(l.Flag.W+2), k.D(l.Flag.H+2)).Draw(func(p *ui.Painter, r ui.Rect) {
+						g := k.Canvas(p, r)
+						g.Rect(0, 0, g.W, g.H, pixel.Edge)
+						g.Sprite(1, 1, l.Flag, 0, pixel.Ink, 1)
+					})
+				}
+				// The row is named already; its text only shows.
+				mark(c, k, l.Name, pixel.Ink, 0)
+			})
+		})
+	})
+	return res
+}