test(Sandbox): extend sandbox test for StatusChatListCategoryItem

Scope was to validate why StatusChatListCategoryItem miss behaves when
used in StatusChatListCategory.

On its own all the events works fine, as it can be seen by monitoring
the click events for each item (title, item and buttons).
However, inside StatusChatListCategory the mouse events are overlapped and
button events trigger also for the item. Tried obvious fiexes like
disabling steal of mouse events from buttons but this break the hovering
effect.

Updates: #6733

sandbox/controls/ListItems.qml

@@ -1,4 +1,6 @@
 import QtQuick 2.14
+import QtQuick.Controls 2.14
+import QtQml.Models 2.14
 import QtQuick.Layouts 1.14
 import StatusQ.Core 0.1
 import StatusQ.Core.Theme 0.1
@@ -6,10 +8,8 @@ import StatusQ.Controls 0.1
 import StatusQ.Components 0.1
 import StatusQ.Core.Utils 0.1
 
-GridLayout {
-    columns: 1
-    columnSpacing: 5
-    rowSpacing: 5
+ColumnLayout {
+    spacing: 5
 
     StatusNavigationListItem {
         title: "Menu Item"
@@ -55,6 +55,57 @@ GridLayout {
         opened: true
     }
 
+    StatusChatListCategoryItem {
+        title: "Chat cat. interactive"
+        opened: true
+        propagateTitleClicks: false
+        showActionButtons: true
+        onAddButtonClicked: testEventsList.eventTriggered("Add button clicked")
+        onMenuButtonClicked: testEventsList.eventTriggered("Menu button clicked")
+        onToggleButtonClicked: opened = !opened
+        onTitleClicked: {
+            testEventsList.eventTriggered("Title clicked")
+        }
+        onClicked: {
+            testEventsList.eventTriggered("Item clicked")
+            mouse.accepted = true
+        }
+    }
+
+    ListView {
+        id: testEventsList
+
+        Layout.fillWidth: true
+        Layout.preferredHeight: 20 * count
+
+        clip: true
+
+        function eventTriggered(message) {
+            let obj = eventDelegateComponent.createObject()
+            obj.text = message
+            model.insert(0, obj)
+        }
+
+        Component {
+            id: eventDelegateComponent
+
+            ItemDelegate {
+                implicitHeight: 20
+
+                property int index: ObjectModel.index
+
+                Timer {
+                    interval: 5000; running: true
+                    onTriggered: testObjeModel.remove(index)
+                }
+            }
+        }
+
+        model: ObjectModel {
+            id: testObjeModel
+        }
+    }
+
     StatusChatListItem {
         name: "group-chat"
         type: StatusChatListItem.Type.GroupChat