Add HTML for proper display of minute(s) and second(s)

wiki/src/download.inline.mdwn

@@ -103,7 +103,17 @@
   <div id="download-text-left" class="pull-left clearfix">
       <div id="download-text-label" class="pull-left">Download Tails <span class="iso-version">[[!inline pages="inc/stable_i386_version" raw="yes"]]</span> ISO image
       <small id="download-eta">
-        <span class="speed-KBs">$SPEED</span> KB/s &mdash; <span class="downloaded-MiB">$DOWNLOADED</span>/<span class="iso-size-MiB">$SIZE</span> MiB, <span class="eta-mins">$ETA</span> minutes left
+        <span class="speed-KBs">$SPEED</span> KB/s &mdash; <span class="downloaded-MiB">$DOWNLOADED</span>/<span class="iso-size-MiB">$SIZE</span> MiB,
+        <span data-value="???">
+          <span class="eta-mins">???</span>
+          <span class="plural">minutes</span>
+          <span class="singular">minute</span>
+        </span>
+        <span data-value="???">
+          <span class="eta-secs">???</span>
+          <span class="plural">seconds</span>
+          <span class="singular">second</span>
+        </span>
       </small>
       </div>
       <div id="download-progress" class="progress">