List drawn shapes under Draw, with icon shapes and colour swatches

Each shape drawn by hand gets a row under Draw, as Import's files do: its
colour swatch, its name, and show/hide, fly-to and remove. A shape is named
in its row, and its swatch opens the five colours there, so labelling and
colouring happen after a shape is drawn and can be seen, instead of in a
field filled in beforehand. Area, Line and Pin become icon buttons, named
for screen readers and tooltips, and the colour for the next shape is a row
of swatches instead of a dropdown.

The annotation engine gains per-mark remove, setHidden, restyle and frame,
and onChange so the list follows the board. A hidden mark stays on the board
at alpha 0, a renamed line keeps its length, and fly-to frames a line by its
whole path. Voice marks are not listed.

The Draw, form-field and segmented-control gates drive the new controls;
swatches are checked as chips, not segments.

src/i18n/locales/es.json

@@ -902,14 +902,15 @@
   "Board cleared.": "Tablero borrado.",
   "Draw on the world — click vertices, double-click or Enter to finish, Esc to cancel": "Dibuja sobre el mundo: haz clic en los vértices, doble clic o Enter para terminar, Esc para cancelar",
   "Draw": "Dibujo",
-  "Shape": "Forma",
   "Shape to draw": "Forma a dibujar",
   "Area": "Área",
   "Line": "Línea",
   "Pin": "Marcador",
-  "Label (optional)": "Etiqueta (opcional)",
-  "Label for the drawn shape": "Etiqueta de la forma dibujada",
-  "Colour of the drawn shape": "Color de la forma dibujada",
+  "Colour of {name}": "Color de {name}",
+  "Change the colour of {name}": "Cambiar el color de {name}",
+  "Name of {name}": "Nombre de {name}",
+  "Colour of the next shape": "Color de la próxima forma",
+  "Drawn shapes": "Formas dibujadas",
   "Primary": "Principal",
   "Amber": "Ámbar",
   "Cyan": "Cian",