Search widget spacing

When user switches from a search filter using an input field to one using a drop-down the bottom margin no longer disappears. The disappearing margin caused an unpleasant bounce effect.

awx/ui/static/less/ansible-ui.less

@@ -708,7 +708,11 @@ select.page-size {
   }
 
   .ui-widget-content a.search-reset-start {
-    color: @grey;
+      color: @grey;
+  }
+
+  #search-widget-spacer {
+      height: 20px;
   }
 
 /* breadcrumbs */

awx/ui/static/lib/ansible/generator-helpers.js

@@ -792,6 +792,8 @@ angular.module('GeneratorHelpers', [])
                 iterator + "HideAllStartBtn" + modifier + "\"" +
                 "><i class=\"fa fa-search\"></i></a>\n";
 
+            html += "<div id=\"search-widget-spacer\" ng-show=\"" + iterator + "SelectShow" + modifier + "\"></div>\n";
+
             if (includeSize) {
                 html += "</div>\n";
             }