show a hint for the user that a tap leads to the info screen in mobile status bar, when no portal is selected.

code/smartphone.js

@@ -117,6 +117,8 @@ window.runOnSmartphonesAfterBoot = function() {
   // add a div/hook for updating mobile info
   $('#updatestatus').prepend('<div id="mobileinfo" onclick="show(\'info\')"></div>');
   window.addHook('portalDetailsUpdated', window.smartphoneInfo);
+  // init msg of status bar. hint for the user that a tap leads to the info screen
+  $('#mobileinfo').html('<div style="text-align: center"><b>tap here for info screen</b></div>');
 
   // disable img full view
   $('#portaldetails').off('click', '**');