QmlDesigner: Fix material name editing issues

Material name field in material browser now ensures that the start
of the string is visible when editing is not focused.

Any click outside the name field will take the focus away from the
field, and name field state is properly updated when focus goes
away for any reason.

Trying to set same name as before is ignored instead of changing the
name to <oldName>1.

Fixes: QDS-8185
Change-Id: I723e3ae312e3e2c4ce8a95a3b05effcee2bae328
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

src/plugins/qmldesigner/components/materialeditor/materialeditorview.cpp

@@ -998,6 +998,10 @@ void MaterialEditorView::renameMaterial(ModelNode &material, const QString &newN
 {
     QTC_ASSERT(material.isValid(), return);
 
+    QVariant objName = material.variantProperty("objectName").value();
+    if (objName.isValid() && objName.toString() == newName)
+        return;
+
     executeInTransaction("MaterialEditorView:renameMaterial", [&] {
         material.setIdWithRefactoring(model()->generateIdFromName(newName, "material"));