TaskTree: Adapt docs for the removed List element

Change-Id: I9adab7a12a590fac4ffb797564fe7cb8988c4584
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: hjk <hjk@qt.io>

src/libs/solutions/tasking/tasktree.cpp

@@ -376,6 +376,46 @@ private:
     \sa {Tasking::Storage} {Storage}
 */
 
+/*!
+    \fn GroupItem::GroupItem(const QList<GroupItem> &items)
+
+    Constructs a \c GroupItem element with a given list of \a items.
+
+    When this \c GroupItem element is parsed by the TaskTree, it is simply replaced with
+    its \a items.
+
+    This constructor is useful when constructing a \l {Tasking::Group} {Group} element with
+    lists of \c GroupItem elements:
+
+    \code
+        static QList<GroupItems> getItems();
+
+        ...
+
+        const Group root {
+            parallel,
+            finishAllAndSuccess,
+            getItems(), // OK, getItems() list is wrapped into a single GroupItem element
+            onGroupSetup(...),
+            onGroupDone(...)
+        };
+    \endcode
+
+    If you want to create a subtree, use \l {Tasking::Group} {Group} instead.
+
+    \note Don't confuse this \c GroupItem with the \l {Tasking::Group} {Group} element, as
+          \l {Tasking::Group} {Group} keeps its children nested
+          after being parsed by the task tree, while this \c GroupItem does not.
+
+    \sa {Tasking::Group} {Group}
+*/
+
+/*!
+    \fn GroupItem::GroupItem(std::initializer_list<GroupItem> items)
+    \overload
+    \sa GroupItem(const QList<Tasking::GroupItem> &items)
+*/
+
 /*!
     \class Tasking::Group
     \inheaderfile solutions/tasking/tasktree.h
@@ -519,69 +559,6 @@ private:
     and the returned item finishes with an error.
 */
 
-/*!
-    \class Tasking::List
-    \inheaderfile solutions/tasking/tasktree.h
-    \inmodule TaskingSolution
-    \brief List is a helper element that wraps a list of GroupItem elements into a single
-           GroupItem element.
-    \reentrant
-
-    \c List is useful when constructing a \l {Tasking::Group} {Group} element with lists of
-    GroupItem elements. If you define a helper function that returns a list of GroupItem elements,
-    it's not easy to place them directly into a group together with other items. Instead, you may
-    wrap the returned list with the \c List element and place it like a single GroupItem element
-    inside a \l {Tasking::Group} {Group}:
-
-    \code
-        static QList<GroupItems> getItems();
-
-        ...
-
-        const Group root {
-            parallel,
-            finishAllAndSuccess,
-            // getItems(),    // Wrong, compile error, as we can't mix QList<GroupItem> with
-                              // GroupItems within the initializer list of root Group.
-            List(getItems()), // OK, getItems() list is wrapped into a single GroupItem element
-                              // via the List element.
-            onGroupSetup(...),
-            onGroupDone(...)
-        };
-    \endcode
-
-    \c List may contain nested \c List elements. \c List doesn't do anything on its own.
-    When parsed by the task tree, the \c List element is simply replaced with its contents.
-
-    \note Don't confuse \c List with the \l {Tasking::Group} {Group} element, as
-          \l {Tasking::Group} {Group} keeps its children nested
-          after being parsed by the task tree, while \c List does not.
-*/
-
-/*!
-    \fn List::List(const QList<GroupItem> &children)
-
-    Constructs a \c List element with a given list of \a children.
-
-    When the \c List element is parsed by the task tree, it is simply replaced with its children.
-
-    If you want to create a subtree, use \l {Tasking::Group} {Group} instead.
-
-    \sa {Tasking::Group} {Group}
-*/
-
-/*!
-    \fn List::List(std::initializer_list<GroupItem> children)
-
-    Constructs a \c List element from \c std::initializer_list given by \a children.
-
-    When the \c List element is parsed by the task tree, it is simply replaced with its children.
-
-    If you want to create a subtree, use \l {Tasking::Group} {Group} instead.
-
-    \sa {Tasking::Group} {Group}
-*/
-
 /*!
     \class Tasking::Sync
     \inheaderfile solutions/tasking/tasktree.h