Make Qt version combo box on welcome screen wider

Expand the width from 140 to 200 px to make sure that usual names do
fit.

Change-Id: I311ba32a7f300e96ec6b6d183d1078467a71e26a
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

share/qtcreator/welcomescreen/examples.qml

@@ -64,8 +64,8 @@ Rectangle {
 
         y: 60
 
-        anchors.right: parent.right
-        anchors.rightMargin: 240
+        anchors.right: comboBox.left
+        anchors.rightMargin: 20
         anchors.left: parent.left
         anchors.leftMargin: 60
 
@@ -78,10 +78,9 @@ Rectangle {
 
         anchors.verticalCenter: searchBar.verticalCenter
 
-        anchors.left: searchBar.right
+        width: 200
         anchors.rightMargin: 80
         anchors.right: parent.right
-        anchors.leftMargin: 20
         model: qtVersionModel
 
         onCurrentIndexChanged: {