QLineEdit: update IM status after selection change

As it stood, we only told the platform about a selection change if
the cursor also changed position. But if you have a selection, and
press key left, the selection will be cleared without moving the
cursor. And for those cases, we didn't report the selection change
back to the platform. The result was that the IM status in the platform
plugin got out of sync with the widget.

This patch will add the missing connection that updates the platform
whenever the selection changes.

Change-Id: Iab0848f27207b63ed4fb47f0d4f24a6d02e87db1
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>

src/widgets/widgets/qlineedit_p.cpp

@@ -188,6 +188,9 @@ void QLineEditPrivate::init(const QString& txt)
     QObject::connect(control, SIGNAL(selectionChanged()),
             q, SLOT(update()));
 
+    QObject::connect(control, SIGNAL(selectionChanged()),
+            q, SLOT(updateMicroFocus()));
+
     QObject::connect(control, SIGNAL(displayTextChanged(QString)),
             q, SLOT(update()));