Display only first page of search results by default and display a total results count

Display only first page of search results by default for each section and
allow clicking on the section header to view all the results for a given
section. This design will allow us to easily move from paging to scrolling
without having to stack multiple scrollbars in a single pane.

Display a total results count next to the section name. This serves as an
indicator that there are more results. The section header pre-lights to
indicate that it can be clicked on.

Make sure we go back to the first page of results when we exit a single
section mode. Make sure we re-instate all result sections if the search
mode is left.

Close the only section search mode on Esc, and only close the search
when Esc is hit again.

js/ui/genericDisplay.js

@@ -430,6 +430,10 @@ GenericDisplay.prototype = {
         return this._list.displayedCount > 0;
     },
 
+    getMatchedItemsCount: function() {
+        return this._matchedItems.length;
+    },
+
     // Load the initial state
     load: function() {
         this._redisplay(true);
@@ -452,6 +456,11 @@ GenericDisplay.prototype = {
         return item.createDetailsActor();
     },
 
+    // Displays the page specified by the pageNumber argument.
+    displayPage: function(pageNumber) {
+        this._list.page = pageNumber;
+    },
+
     //// Protected methods ////
 
     /*
@@ -680,11 +689,6 @@ GenericDisplay.prototype = {
         }));
     },
 
-    // Displays the page specified by the pageNumber argument.
-    _displayPage: function(pageNumber) {
-        this._list.page = pageNumber;
-    },
-
     /*
      * Updates the display control to reflect the matched items set and the page selected.
      *
@@ -711,7 +715,7 @@ GenericDisplay.prototype = {
                 pageControl.connect('clicked',
                                     Lang.bind(this,
                                               function(o, event) {
-                                                  this._displayPage(pageNumberLocalScope);
+                                                  this.displayPage(pageNumberLocalScope);
                                               }));
             }
         } else {