made infix completer case INsensitive

source/ArmarXGui/libraries/ArmarXGuiBase/widgets/InfixCompleter.cpp

@@ -12,6 +12,7 @@ namespace armarx
         QListView* popup = new QListView();
         completionModel = new QStringListModel(completionList, this);
         proxyModel = new InfixFilterModel();
+        proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
         proxyModel->setSourceModel(completionModel);
         setModel(proxyModel);
         setPopup(popup);