fixup! Bug 2176: Rebrand Firefox to TorBrowser

Bug 42466: Use the existing #trademark element from mozilla for Tor
Browser's trademark statement.

browser/base/content/aboutDialog.xhtml

@@ -20,7 +20,7 @@
         data-l10n-id="aboutDialog-title"
 #endif
         role="dialog"
-        aria-describedby="version distribution distributionId projectDesc helpDesc trademark trademarkTor"
+        aria-describedby="version distribution distributionId projectDesc helpDesc trademark"
         >
 #ifdef XP_MACOSX
 #include macWindow.inc.xhtml
@@ -150,7 +150,6 @@
         <label is="text-link" class="bottom-link" useoriginprincipal="true" href="about:license" data-l10n-id="about-dialog-browser-license-link"></label>
       </hbox>
       <description id="trademark" data-l10n-id="trademarkInfo"></description>
-      <description id="trademarkTor" data-l10n-id="about-dialog-trademark-statement"></description>
     </vbox>
   </html:div>
 

browser/base/content/aboutDialogTor.css

@@ -18,15 +18,10 @@
 }
 
 #trademark {
-  display: none;
-}
-
-#trademarkTor {
   font-size: xx-small;
   text-align: center;
   color: #999999;
-  margin-top: 10px;
-  margin-bottom: 10px;
+  margin-block: 10px;
 }
 
 #bottomBox > hbox:not(#newBottom) {