Fixed a context menu bug which caused an assert on empty view

apps/launcher/datafilespage.cpp

@@ -643,6 +643,10 @@ void DataFilesPage::scrollToSelection()
 
 void DataFilesPage::showContextMenu(const QPoint &point)
 {
+    // Make sure there are plugins in the view
+    if (!mPluginsTable->selectionModel()->hasSelection()) {
+        return;
+    }
     
     QPoint globalPos = mPluginsTable->mapToGlobal(point);