EditorManager: Add "Find in this directory..." for open files

Also add in Projects view

Change-Id: I42145c742a38f5538a4ed44574963136aa18e134
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/coreplugin/fileutils.cpp

@@ -140,6 +140,11 @@ void FileUtils::openTerminal(const QString &path)
     QProcess::startDetached(terminalEmulator, args, pwd);
 }
 
+QString FileUtils::msgFindInDirectory()
+{
+    return QApplication::translate("Core::Internal", "Find in This Directory...");
+}
+
 QString FileUtils::msgGraphicalShellAction()
 {
     if (HostOsInfo::isWindowsHost())