AutoTest: Provide possibility to copy tree items

This allows to create a copy of an item. Basically it will
copy its member objects, but it does not copy its children.
Preparation for extending grouping support for GTest.

Change-Id: I75f92be53ff4191cacea2944b31641a9292d1e58
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/autotest/quick/quicktesttreeitem.cpp

@@ -35,6 +35,13 @@
 namespace Autotest {
 namespace Internal {
 
+TestTreeItem *QuickTestTreeItem::copyWithoutChildren()
+{
+    QuickTestTreeItem *copied = new QuickTestTreeItem;
+    copied->copyBasicDataFrom(this);
+    return copied;
+}
+
 QVariant QuickTestTreeItem::data(int column, int role) const
 {
     switch (role) {