Bug 1587143 - Updated the Fxa toolbar devices button link r=eoger

Differential Revision: https://phabricator.services.mozilla.com/D48589

--HG--
extra : moz-landing-system : lando

browser/components/customizableui/content/panelUI.inc.xul

@@ -804,7 +804,7 @@
         <toolbarbutton id="PanelUI-fxa-menu-account-devices-button"
                        class="subviewbutton subviewbutton-iconic"
                        label="&fxa.menu.deviceSettings.label;"
-                       oncommand="gSync.openDevicesManagementPage('fxamenu');"/>
+                       oncommand="gSync.openPrefsFromFxaMenu('sync_settings', this);"/>
         <toolbarseparator/>
         <toolbarbutton id="PanelUI-fxa-menu-account-signout-button"
                 class="subviewbutton subviewbutton-iconic"