Filemanager: Ignore editory with temporary files

When switching to a editor containing a temporary file do not
update the filemanager, even when sync to editor is enabled.

Task-number: QTCREATORBUG-2605
Reviewed-by: Thorbjorn Lindeijer

src/plugins/coreplugin/filemanager.cpp

@@ -980,7 +980,8 @@ void FileManager::syncWithEditor(Core::IContext *context)
         return;
 
     Core::IEditor *editor = Core::EditorManager::instance()->currentEditor();
-    if (editor && (editor->widget() == context->widget()))
+    if (editor && (editor->widget() == context->widget()) &&
+        !editor->isTemporary())
         setCurrentFile(editor->file()->fileName());
 }