Doc: add links to new topics in Qt Creator Manual 3.6

Change-Id: I4e317c8dad847c4b4be5e9a9d7c904abc2fa95c7
Reviewed-by: Martin Smith <martin.smith@theqtcompany.com>

doc/global/externalsites/qtcreator.qdoc

@@ -105,6 +105,10 @@
     \externalpage http://doc.qt.io/qtcreator/qtcreator-transitions-example.html
     \title Qt Creator: Creating a Qt Quick Application
 */
+/*!
+    \externalpage http://doc.qt.io/qtcreator/qtquick-iso-icon-browser.html
+    \title Qt Creator: Browsing ISO 7000 Icons
+*/
 /*!
     \externalpage http://doc.qt.io/qtcreator/quick-export-to-qml.html
     \title Qt Creator: Exporting Designs from Graphics Software
@@ -209,6 +213,10 @@
     \externalpage http://doc.qt.io/qtcreator/creator-mime-types.html
     \title Qt Creator: Editing MIME Types
 */
+/*!
+    \externalpage http://doc.qt.io/qtcreator/creator-modeling.html
+    \title Qt Creator: Modeling
+*/
 /*!
     \externalpage http://doc.qt.io/qtcreator/creator-qml-debugging-example.html
     \title Qt Creator: Debugging a Qt Quick Example Application