Merge pull request #3715 from node-red/fix-hide-flows-count

Ensure 'hidden flow' count doesn't include subflows

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

@@ -284,9 +284,22 @@ RED.workspaces = (function() {
                         onselect: "core:show-last-hidden-flow"
                     }
                 ]
-                if (hideStack.length > 0) {
+                let hiddenFlows = new Set()
+                for (let i = 0; i < hideStack.length; i++) {
+                    let ids = hideStack[i]
+                    if (!Array.isArray(ids)) {
+                        ids = [ids]
+                    }
+                    ids.forEach(id => {
+                        if (RED.nodes.workspace(id)) {
+                            hiddenFlows.add(id)
+                        }
+                    })
+                }
+                const flowCount = hiddenFlows.size;
+                if (flowCount > 0) {
                     menuItems.unshift({
-                        label: RED._("workspace.hiddenFlows",{count: hideStack.length}),
+                        label: RED._("workspace.hiddenFlows",{count: flowCount}),
                         onselect: "core:list-hidden-flows"
                     })
                 }