fix:应用商店退出时，aria2c仍然在运行

src/backend/downloadworker.cpp

@@ -138,7 +138,7 @@ void DownloadController::startDownload(const QString &url)
             command.append(aria2NoSeeds.toUtf8());
         }
         qDebug() << command;
-        auto cmd = new QProcess();
+        auto cmd = new QProcess(this);
         cmd->setProcessChannelMode(QProcess::MergedChannels);
         cmd->setProgram("aria2c");
         cmd->setArguments(command);

src/widgets/common/progressbutton.h

@@ -37,7 +37,6 @@ private:
     {
         normal,
         hover,
-        fromRoundedCornersToRounded,//从圆角变成圆形
         openProgress,
         closeProgress,
         recovery

src/widgets/downloadlistwidget.cpp

@@ -51,6 +51,8 @@ DownloadListWidget::DownloadListWidget(QWidget *parent) :
 
 DownloadListWidget::~DownloadListWidget()
 {
+    downloadController->stopDownload();
+    delete downloadController;
     delete ui;
 }
 void DownloadListWidget::clearItem()