show primary constructor properties in project view when "Show members" is enabled

#KT-11776 Fixed

idea/idea-analysis/src/org/jetbrains/kotlin/idea/structureView/KotlinStructureViewElement.kt

@@ -88,7 +88,7 @@ class KotlinStructureViewElement(val element: NavigatablePsiElement,
     private val childrenDeclarations: List<KtDeclaration>
         get() = when (element) {
             is KtFile -> element.declarations
-            is KtClass -> element.getPrimaryConstructorParameters().filter { it.hasValOrVar() } + element.declarations
+            is KtClass -> element.getStructureDeclarations()
             is KtClassOrObject -> element.declarations
             is KtFunction, is KtClassInitializer -> element.collectLocalDeclarations()
             else -> emptyList()
@@ -110,3 +110,6 @@ class KotlinStructureViewElement(val element: NavigatablePsiElement,
         return result
     }
 }
+
+fun KtClassOrObject.getStructureDeclarations() = getPrimaryConstructorParameters().filter { it.hasValOrVar() } + declarations
+

idea/src/org/jetbrains/kotlin/idea/projectView/KtClassOrObjectTreeNode.kt

@@ -24,6 +24,7 @@ import com.intellij.ide.util.treeView.AbstractTreeNode
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.idea.KotlinIconProvider
+import org.jetbrains.kotlin.idea.structureView.getStructureDeclarations
 import org.jetbrains.kotlin.psi.KtClassOrObject
 import org.jetbrains.kotlin.psi.KtPsiUtil
 
@@ -34,7 +35,7 @@ class KtClassOrObjectTreeNode(project: Project?, ktClassOrObject: KtClassOrObjec
 
     override fun getChildrenImpl(): Collection<AbstractTreeNode<*>>? {
         if (value != null && settings.isShowMembers) {
-            return value.declarations.map { declaration ->
+            return value.getStructureDeclarations().map { declaration ->
                 if (declaration is KtClassOrObject)
                     KtClassOrObjectTreeNode(project, declaration, settings)
                 else