Sections could be non-collapsible

A property named collapsible is considered for Sections. The default
value is true for this property.
The section would be affected by the user collapse request if the
collapsible is true (Single collapse by clicking, and colapseAll
request). Otherwise, the section will not be affected by user
requests.

Task-number: QDS-7527
Change-Id: Ic4c9d0489d4b8c9ec90a0c71c755fa4c52935d39
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

share/qtcreator/qmldesigner/materialEditorQmlSources/MaterialEditorTopSection.qml

@@ -197,6 +197,7 @@ Column {
         // Section with hidden header is used so properties are aligned with the other sections' properties
         hideHeader: true
         width: parent.width
+        collapsible: false
 
         SectionLayout {
             PropertyLabel { text: qsTr("Name") }

share/qtcreator/qmldesigner/propertyEditorQmlSources/imports/HelperWidgets/Section.qml

@@ -51,6 +51,7 @@ Item {
     property int level: 0
     property int levelShift: 10
     property bool hideHeader: false
+    property bool collapsible: true
     property bool expandOnClick: true // if false, toggleExpand signal will be emitted instead
     property bool addTopPadding: true
     property bool addBottomPadding: true
@@ -70,7 +71,10 @@ Item {
 
     Connections {
         target: Controller
-        function onCollapseAll() { section.expanded = false }
+        function onCollapseAll() {
+            if (collapsible)
+                section.expanded = false
+        }
         function onExpandAll() { section.expanded = true }
     }
 
@@ -142,6 +146,9 @@ Item {
             acceptedButtons: Qt.LeftButton | Qt.RightButton
             onClicked: function(mouse) {
                 if (mouse.button === Qt.LeftButton) {
+                    if (!section.collapsible && section.expanded)
+                        return
+
                     transition.enabled = true
                     if (section.expandOnClick)
                         section.expanded = !section.expanded