Doc: Small fixes

Change-Id: I163f69c14ecbc07a66b1bac7c5a53b22405c895e
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>

src/controls/TextArea.qml

@@ -623,7 +623,7 @@ ScrollView {
     /*!
         \qmlproperty TextDocument TextArea::textDocument
 
-        This property exposes the \l QTextDocument of this TextArea.
+        This property exposes the \l QQuickTextDocument of this TextArea.
         \sa TextEdit::textDocument
     */
     property alias textDocument: edit.textDocument

src/controls/doc/src/qtquickcontrols-index.qdoc

@@ -125,7 +125,7 @@
      \li \l {Qt Quick Controls Styles}
     \endlist
 
-    \section2 Styles
+    \section2 Layouts
     \list
      \li \l {Qt Quick Layouts}
     \endlist