EffectMaker: Show current composition name

Fixes: QDS-11442
Change-Id: I047040e42fd60c00abe2be7e2210fc8bb53678cb
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Amr Elsayed <amr.elsayed@qt.io>
Reviewed-by: Qt CI Patch Build Bot <ci_patchbuild_bot@qt.io>

share/qtcreator/qmldesigner/effectMakerQmlSources/EffectMakerTopBar.qml

@@ -26,6 +26,14 @@ Rectangle {
         onClicked: root.saveClicked()
     }
 
+    Text {
+        readonly property string compName: EffectMakerBackend.effectMakerModel.currentComposition
+
+        text: compName !== "" ? compName : qsTr("Untitled")
+        anchors.centerIn: parent
+        color: StudioTheme.Values.themeTextColor
+    }
+
     HelperWidgets.AbstractButton {
         anchors.verticalCenter: parent.verticalCenter
         anchors.rightMargin: 5

src/plugins/effectmakernew/effectmakermodel.cpp

@@ -150,6 +150,7 @@ void EffectMakerModel::clear()
     qDeleteAll(m_nodes);
     m_nodes.clear();
     endResetModel();
+    setCurrentComposition("");
 
     setIsEmpty(true);
     emit nodesChanged();