Use a bullet instead of empty margin when score is hidden

This is prettier and keeps consistency across the app.

templates/comment.html

@@ -5,9 +5,13 @@
 {% else if kind == "t1" %}
 <div id="{{ id }}" class="comment">
 	<div class="comment_left">
-        {% if prefs.hide_score != "on" %}
-		<p class="comment_score" title="{{ score.1 }}">{{ score.0 }}</p>
-        {% endif %}
+    <p class="comment_score" title="{{ score.1 }}">
+         {% if prefs.hide_score != "on" %}
+         {{ score.0 }}
+         {% else %}
+         &#x2022;
+         {% endif %}
+    </p>
         <div class="line"></div>
 	</div>
 	<details class="comment_right" {% if !collapsed || highlighted %}open{% endif %}>