Merge pull request #3391 from node-red-hitachi/fix-hide-flow-tooltip

fix to hide tooltip after removing subflow tab

packages/node_modules/@node-red/editor-client/src/js/ui/common/popover.js

@@ -350,6 +350,15 @@ RED.popover = (function() {
             }
         }
 
+        target.on("remove", function (ev) {
+            if (timer) {
+                clearTimeout(timer);
+            }
+            if (active) {
+                active = false;
+                setTimeout(closePopup,delay.hide);
+            }
+        });
         if (trigger === 'hover') {
             target.on('mouseenter',function(e) {
                 clearTimeout(timer);