Remember context sidebar tree state when refreshing

Closes #5008

packages/node_modules/@node-red/nodes/core/common/lib/debug/debug-utils.js

@@ -511,9 +511,10 @@ RED.debug = (function() {
             typeHint: format,
             hideKey: false,
             path: path,
-            sourceId: sourceNode&&sourceNode.id,
+            sourceId: sourceNode && sourceNode.id,
             rootPath: path,
             nodeSelector: config.messageSourceClick,
+            enablePinning: true
         });
         // Do this in a separate step so the element functions aren't stripped
         debugMessage.appendTo(el);