[Search] Empty search resets results

When there is no input into the search bar
no results are displayed/displayed results
are removed. This is because the search
providers were changed to return empty
arrays for empty search strings.

platform/commonUI/general/res/css/tree.css

@@ -272,9 +272,9 @@ ul.tree {
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
 /* line 27, ../sass/search/_search.scss */
-.search .searchbar {
+.search .search-input {
   width: 100%;
-  margin-top: 20px; }
+  margin-top: 10px; }
 /* line 32, ../sass/search/_search.scss */
 .search .results {
   margin-top: 10px; }

platform/commonUI/general/res/sass/search/_search.scss

@@ -24,9 +24,9 @@
     $iconWidth: 20px;
     $leftMargin: 6px;
     
-    .searchbar {
+    .search-input {
         width: 100%;
-        margin-top: 20px;
+        margin-top: 10px;
     }
     
 	.results {

platform/features/search/res/templates/search.html

@@ -23,7 +23,7 @@
       ng-controller="SearchController as controller">
     <!-- Search bar input -->
     <div>
-        <input class="searchbar"
+        <input class="search-input"
                id="searchbarinput" 
                type="text" 
                value=""

platform/features/search/src/providers/ElasticsearchSearchProvider.js

@@ -159,6 +159,8 @@ define(
                 // Get the user input 
                 searchTerm = document.getElementById(inputID).value;
                 
+                // If the user input is empty, we want to have no search results.
+                if (searchTerm !== '') {
                     // Process search term
                     searchTerm = processSearchTerm(searchTerm);
 
@@ -177,6 +179,11 @@ define(
                         // ...then process the data 
                         return processResults(rawResults, timestamp);
                     });
+                } else {
+                    latestResults = [];
+                    lastSearchTimestamp = timestamp;
+                    return latestResults;
+                }
             }
             
             return {

platform/features/search/src/workers/GenericSearchWorker.js

@@ -135,6 +135,9 @@
             terms = convertToTerms(input), 
             timesToLoop = Math.min(indexedItems.length, data.maxNumber);
         
+        
+        // If the user input is empty, we want to have no search results.
+        if (input !== '') {
             for (var i = 0; i < timesToLoop; i++) {
                 var score = scoreItem(indexedItems[i], input, terms);
                 if (score > 0) {
@@ -143,6 +146,7 @@
                     };
                 }
             }
+        }
         
         var message = {
             request: 'search',