Choose how fast the world timeline plays

A speed menu beside play offers real time, an hour, a day or a week a
second, a day a second to start with. A speed chosen while playing applies
at once; chosen while weather's own replay steps its frames, it takes
playback over from where it is. Play starts again from the top only at live
or at the very end, so a pause just before the end plays on. On phones the
menu sits beside the track, a full-size target.

src/i18n/locales/ar.json

@@ -3221,5 +3221,9 @@
   "Download this scene as JSON or an asset bundle": "تنزيل هذا المشهد بصيغة JSON أو حزمة موارد",
   "World time": "وقت العالم",
   "Back to live": "العودة إلى البث المباشر",
-  "Live": "مباشر"
+  "Live": "مباشر",
+  "1 h/s": "ساعة/ث",
+  "1 d/s": "يوم/ث",
+  "1 wk/s": "أسبوع/ث",
+  "Play speed": "سرعة التشغيل"
 }