[Search] Declare UI components as templates

Declare Search UI components as templates instead of
representations so that they are not removed from the
DOM when no domain object is supplied. Fixes
nasa/openmctweb#234

platform/commonUI/browse/res/templates/browse.html

@@ -34,10 +34,9 @@
                     </mct-representation>
                     <div class='holder search-holder abs'
                          ng-class="{active: treeModel.search}">
-                        <mct-representation key="'search'"
-                                     mct-object="domainObject"
+                        <mct-include key="'search'"
                                      ng-model="treeModel">
-                        </mct-representation>
+                        </mct-include>
                     </div>
                     <div class='tree-holder abs mobile-tree-holder'
                          ng-hide="treeModel.search">