Hide nodes without visible children in the property editor

ui/bootstrap/src/main/kotlin/hep/dataforge/vision/bootstrap/tabComponent.kt

@@ -45,7 +45,7 @@ public val TabPane: FunctionalComponent<TabPaneProps> = functionalComponent("Tab
                         +(cp.title ?: cp.id)
                         attrs {
                             if (cp.id == activeTab) {
-                                classes += "active"
+                                classes = classes + "active"
                             }
                             onClickFunction = {
                                 activeTab = cp.id

ui/bootstrap/src/main/kotlin/hep/dataforge/vision/bootstrap/threeControls.kt

@@ -22,7 +22,7 @@ public external interface ThreeControlsProps : RProps {
 @JsExport
 public val ThreeControls: FunctionalComponent<ThreeControlsProps> = functionalComponent { props ->
     val vision = props.canvas.content
-    tabPane {
+    tabPane(if (props.selected != null) "Properties" else null) {
         tab("Canvas") {
             card("Canvas configuration") {
                 canvasControls(props.canvas)

ui/react/src/main/kotlin/hep/dataforge/vision/react/PropertyEditor.kt

@@ -66,12 +66,9 @@ private val PropertyEditorItem: FunctionalComponent<PropertyEditorProps> =
 private fun RBuilder.propertyEditorItem(props: PropertyEditorProps) {
     var expanded: Boolean by useState { true }
     val descriptorItem: ItemDescriptor? = props.descriptor?.get(props.name)
-    if (descriptorItem?.hidden == true) return //fail fast for hidden property
     var ownProperty: MetaItem? by useState { props.ownProperties.getItem(props.name) }
     val actualItem: MetaItem? = props.allProperties?.getItem(props.name)
 
-    println("Actual item for ${props.name?.toString()} is ${actualItem.toString()}")
-
     val token = props.name.lastOrNull()?.toString() ?: "Properties"
 
     fun update() {
@@ -108,6 +105,17 @@ private fun RBuilder.propertyEditorItem(props: PropertyEditorProps) {
     }
 
     if (actualItem is NodeItem) {
+        val keys = buildSet {
+            (descriptorItem as? NodeDescriptor)?.items?.filterNot {
+                it.key.startsWith("@")  || it.value.hidden
+            }?.forEach {
+                add(NameToken(it.key))
+            }
+            ownProperty?.node?.items?.keys?.filterNot { it.body.startsWith("@") }?.let { addAll(it) }
+        }
+        // Do not show nodes without visible children
+        if (keys.isEmpty()) return
+
         styledDiv {
             css {
                 +TreeStyles.treeLeaf
@@ -138,14 +146,7 @@ private fun RBuilder.propertyEditorItem(props: PropertyEditorProps) {
                 css {
                     +TreeStyles.tree
                 }
-                val keys = buildSet {
+                keys.forEach { token ->
-                    (descriptorItem as? NodeDescriptor)?.items?.keys?.forEach {
-                        add(NameToken(it))
-                    }
-                    ownProperty?.node?.items?.keys?.let { addAll(it) }
-                }
-
-                keys.filter { !it.body.startsWith("@") }.forEach { token ->
                     styledLi {
                         css {
                             +TreeStyles.treeItem