example, touchinteraction: use forceActiveFocus to gain focus

Use forceActiveFocus to gain focus when the user clicks on
a note. Just setting focus on an item is not enough to gain
keyboard focus.

Change-Id: Ia4a68a17df0df4b321cc6edb646b39c36167e982
Reviewed-by: J-P Nurmi <jpnurmi@theqtcompany.com>
Reviewed-by: Caroline Chao <caroline.chao@theqtcompany.com>

examples/quick/touchinteraction/flickable/content/Panel.qml

@@ -116,7 +116,7 @@ Component {
                             drag.maximumY: page.height - 80
                             drag.minimumX: 100
                             drag.maximumX: page.width - 140
-                            onClicked: { myText.focus = true; Qt.inputMethod.show(); }
+                            onClicked: myText.forceActiveFocus()
                         }
                     }
                 }