Bug 695738: Change templates to use field_descs.op_sys instead of hard coded 'OS'

template/en/default/list/edit-multiple.html.tmpl

@@ -104,7 +104,7 @@
   <tr>
     <th>
       <label for="op_sys">
-        <a href="page.cgi?id=fields.html#op_sys">OS</a>:
+        <a href="page.cgi?id=fields.html#op_sys">[% field_descs.op_sys FILTER html %]</a>:
       </label>
     </th>
     <td [% " colspan=\"3\"" IF !Param("usetargetmilestone") %]>

template/en/default/pages/bug-writing.html.tmpl

@@ -55,12 +55,13 @@ no-one else appears to have reported it, then:</p>
     Click the word "Component" to see a description of each 
     component. If none seems appropriate, look for a "General" component.</p>
 
-    <p><b>OS:</b> On which operating system (OS) did you find 
+    <p><b>[% field_descs.op_sys FILTER html %]:</b> On which operating system (OS) did you find 
           it?
     (e.g. Linux, Windows XP, Mac OS X.)<br>
     If you know the [% terms.bug %] happens on more than one type of 
     operating system, choose <em>[% display_value("op_sys", "All") FILTER html %]</em>. 
-    If your OS isn't listed, choose <em>[% display_value("op_sys", "Other") FILTER html %]</em>.</p>
+    If your [% field_descs.op_sys FILTER html %] isn't listed, choose 
+    <em>[% display_value("op_sys", "Other") FILTER html %]</em>.</p>
 
     <p><b>Summary:</b> How would you describe the [% terms.bug %], in 
     approximately 60 or fewer characters?<br>