fix: 任务栏蓝牙插件无刷新按钮

蓝牙第一次插入时电源状态有可能是错误的，导致任务栏蓝牙插件刷新按钮初始化错误，在蓝牙适配器电源状态改变时设置刷新按钮的显示状态

Log: 蓝牙插件刷新按钮去掉了无法刷新列表
Bug: https://pms.uniontech.com/zentao/bug-view-60828.html
Change-Id: I2df971ffce5d2a4ce60c2835b540465c25890131

plugins/bluetooth/componments/bluetoothadapteritem.cpp

@@ -293,6 +293,7 @@ void BluetoothAdapterItem::initConnect()
 
     connect(m_adapter, &Adapter::poweredChanged, this, [ = ] (bool state) {
         initData();
+        m_refreshBtn->setVisible(state);
         m_deviceListview->setVisible(state);
         m_adapterStateBtn->setChecked(state);
         m_adapterStateBtn->setEnabled(true);