am 641c2c2f: clarify the hidden APIs in reference with better tooltips

* commit '641c2c2fdaf68fa48b044177fef7c890a42c8a11':
  clarify the hidden APIs in reference with better tooltips

tools/droiddoc/templates-sdk/assets/js/docs.js

@@ -2382,7 +2382,8 @@ function toggleVisisbleApis(selectedLevel, context) {
     // Grey things out that aren't available and give a tooltip title
     if (apiLevelNum > selectedLevelNum) {
       obj.addClass("absent").attr("title","Requires API Level \""
-            + apiLevel + "\" or higher");
+            + apiLevel + "\" or higher. To reveal, change the target API level "
+              + "above the left navigation.");
     }
     else obj.removeClass("absent").removeAttr("title");
   });

tools/droiddoc/templates-sdk/customizations.cs

@@ -214,7 +214,8 @@ def:default_left_nav() ?>
 <a class="totop" href="#top" data-g-event="left-nav-top">to top</a>
       <div id="api-nav-header">
         <div id="api-level-toggle">
-          <label for="apiLevelCheckbox" class="disabled">API level: </label>
+          <label for="apiLevelCheckbox" class="disabled"
+            title="Select your target API level to dim unavailable APIs">API level: </label>
           <div class="select-wrapper">
             <select id="apiLevelSelector">
               <!-- option elements added by buildApiLevelSelector() -->