Bug 1368957 - Making the labels for containers highlightable r=mconley

MozReview-Commit-ID: 3Tjc8ARhZuz

--HG--
extra : rebase_source : 1c8f9a319e9f43866e6e6418619efc89b3250389

browser/components/preferences/handlers.xml

@@ -76,7 +76,7 @@
       <xul:hbox flex="1" equalsize="always">
         <xul:hbox flex="1" align="center">
           <xul:hbox xbl:inherits="data-identity-icon=containerIcon,data-identity-color=containerColor" height="24" width="24" class="userContext-icon"/>
-          <xul:label flex="1" crop="end" xbl:inherits="value=containerName"/>
+          <xul:label flex="1" crop="end" xbl:inherits="xbl:text=containerName,highlightable"/>
         </xul:hbox>
         <xul:hbox flex="1" align="right">
           <xul:button anonid="preferencesButton"