feat: also hide selected location from branch search facet

The 'branch' facet, which can be added to the list of search facets to
be displayed, also contains locations (library branches) and therefore
must also be affected by the filter, which is what this commit
implements.

code/web/sys/SearchObject/GroupedWorkSearcher2.php

@@ -789,7 +789,7 @@ public function getFacetList($filter = null) {
 			// Get a list of branches so we can access their 'showInSearchFacet' value
 			// Also rename the keys to the branches' names so they can easily be accessed later
 			$branchList = null;
-			if ($field == 'available_at') {
+			if ($field == 'available_at' || $field == 'owning_location') {
 				$mainBranch = new Location();
 				$branchList = $mainBranch->getLocationListAsObjects(false);
 				// may need to be optimised / unsure how heavy this is
@@ -806,7 +806,7 @@ public function getFacetList($filter = null) {
 				// if populating the array of facet options for 'available at'
 				// then filter out any branch (location) for which showInSearchFacet has been set to "0"
 				// thus preventing these branches from being displayed as search by options
-				if ($field == 'available_at') {
+				if ($field == 'available_at' || $field == 'owning_location') {
 					$branchName = substr($facetValue, 5);
 					if (empty($branchList[$branchName]->showInSearchFacet)) {
 						continue;