Merge branch 'fanpengcheng/uos_bug33650_32857' into 'uos'

fix: 修复任务栏出现多个的问题

See merge request dde-v20/dde-dock!631

frame/main.cpp

@@ -100,6 +100,7 @@ int main(int argc, char *argv[])
     parser.addOption(disablePlugOption);
     parser.process(app);
 
+    DGuiApplicationHelper::setSingelInstanceInterval(-1);
     if (!app.setSingleInstance(QString("dde-dock_%1").arg(getuid()))) {
         qDebug() << "set single instance failed!";
         return -1;