fix bug 33545, button too wide + typo on button

xpfe/components/prefwindow/resources/content/pref-wallet.xul

@@ -99,6 +99,10 @@
   </titledbox>
 
   <spring class="vgap"/>
-  <titledbutton value="&changePasswords.label;" class="dialog push" onclick="changePasswords();"/>
-  
+  <box align="horizontal">
+    <spring flex="50%"/>
+    <titledbutton value="&changePasswords.label;" class="dialog push"
+                  onclick="changePasswords();"/>
+    <spring flex="50%"/>
+  </box>
 </window>

xpfe/components/prefwindow/resources/locale/en-US/pref-wallet.dtd

@@ -15,4 +15,4 @@
 <!ENTITY signonEnabledCheck.accesskey "s">
 <!ENTITY walletEnabledCheck.label "Save form data when submitting forms.">
 <!ENTITY walletEnabledCheck.accesskey "w">
-<!ENTITY changePasswords.label "Change Passwords">
+<!ENTITY changePasswords.label "Change Master Password">