Bug 1264436 - Make enable persist logs option markup consistent with others. r=ntim

MozReview-Commit-ID: LZaRzOlggi1

--HG--
extra : transplant_source : %D3%E0A%98%F8%DC%9Aqb%AC%BD%C6%91%25%C4Ud%E54%87

devtools/client/framework/toolbox-options.xhtml

@@ -45,7 +45,7 @@
         <legend>&options.commonPrefs.label;</legend>
         <label title="&options.enablePersistentLogs.tooltip;">
           <input type="checkbox" data-pref="devtools.webconsole.persistlog" />
-          &options.enablePersistentLogs.label;
+          <span>&options.enablePersistentLogs.label;</span>
         </label>
       </fieldset>