tr()-fixes for 2.6

- 'profile' -> 'target'.
- 'qt version' -> 'Qt version'. Fix occurrences in comments as
  well to make grepping easier.
- Placeholders.

Change-Id: I451eae2f0571bccf1e75cf0def425a09fa80855b
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/qtsupport/exampleslistmodel.cpp

@@ -326,7 +326,7 @@ QStringList ExamplesListModel::exampleSources(QString *examplesFallback, QString
         return sources;
 
     // try to find a suitable Qt version
-    m_updateOnQtVersionsChanged = true; // this must be updated when the qt versions change
+    m_updateOnQtVersionsChanged = true; // this must be updated when the Qt versions change
     // fallbacks are passed back if no example manifest is found
     // and we fallback to Qt Creator's shipped manifest (e.g. only old Qt Versions found)
     QString potentialExamplesFallback;