Do not display deactivated users when their balance is really small

Cases has been reported of rounding issues making deactivated users
reapparing. This is due to the fact we're using floats (see #528 for
details)

Fixes #1336

ihatemoney/templates/sidebar_table_layout.html

@@ -11,7 +11,7 @@
         </tr>
       </thead>
     {%- endif %}
-    {%- for member in g.project.members | sort(attribute='name') if member.activated or balance[member.id]|round(2) != 0 %}
+    {%- for member in g.project.members | sort(attribute='name') if member.activated or balance[member.id]|round(2)|abs >= 0.01 %}
       <tr id="bal-member-{{ member.id }}" action="{% if member.activated %}delete{% else %}reactivate{% endif %}">
         <td class="balance-name">{{ member.name }}
           {%- if show_weight -%}
@@ -61,4 +61,4 @@
 {% endblock %}
 
 {# It must be set outside of the block definition #}
-{% set messages_shown = True %}
+{% set messages_shown = True %}