zoom level was not reflected in url on submap open

CHANGELOG

 minerva (15.1.1) stable; urgency=medium
   * Bug fix: export to CD maps with species containing ":" or "." in species id
     generated files that could not be opened in CellDesigner (#1363) 
+  * Bug fix: zoom level change was not reflected in the url when submap was
+    opened (#1338)
 
  -- Piotr Gawron <piotr.gawron@uni.lu>  Thu, 23 Nov 2020 15:00:00 +0200
 

frontend-js/src/main/js/minerva.js

@@ -376,6 +376,7 @@ function addUrlChangeListenersToCustomMap(customMap) {
     GuiConnector.setUrlParam("x", Math.round(event.arg.x).toString());
     // noinspection JSSuspiciousNameCombination
     GuiConnector.setUrlParam("y", Math.round(event.arg.y).toString());
+    GuiConnector.setUrlParam("zoom", event.object.getZoom().toString());
   };
 
   var onZoomChangedHandler = function (event) {