Fix many memory leaks.

logic/net/ByteArrayDownload.h

@@ -26,7 +26,7 @@ public:
 	{
 		return ByteArrayDownloadPtr(new ByteArrayDownload(url));
 	}
-
+    virtual ~ByteArrayDownload() {};
 public:
 	/// if not saving to file, downloaded data is placed here
 	QByteArray m_data;

logic/net/CacheDownload.h

@@ -41,6 +41,7 @@ public:
 	{
 		return CacheDownloadPtr(new CacheDownload(url, entry));
 	}
+	virtual ~CacheDownload(){};
 	QString getTargetFilepath()
 	{
 		return m_target_path;

logic/net/ForgeMirrors.h

@@ -39,7 +39,7 @@ public:
 	{
 		return ForgeMirrorsPtr(new ForgeMirrors(libs, parent_job, mirrorlist));
 	}
-
+	virtual ~ForgeMirrors(){};
 protected
 slots:
 	virtual void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);

logic/net/ForgeXzDownload.h

@@ -45,6 +45,7 @@ public:
 	{
 		return ForgeXzDownloadPtr(new ForgeXzDownload(relative_path, entry));
 	}
+	virtual ~ForgeXzDownload(){};
 	void setMirrors(QList<ForgeMirror> & mirrors);
 
 protected

logic/net/MD5EtagDownload.h

@@ -38,6 +38,7 @@ public:
 	{
 		return Md5EtagDownloadPtr(new MD5EtagDownload(url, target_path));
 	}
+	virtual ~MD5EtagDownload(){};
 protected
 slots:
 	virtual void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);

logic/net/NetJob.h

@@ -32,7 +32,7 @@ class NetJob : public ProgressProvider
 	Q_OBJECT
 public:
 	explicit NetJob(QString job_name) : ProgressProvider(), m_job_name(job_name) {};
-
+	virtual ~NetJob() {};
 	template <typename T> bool addNetAction(T action)
 	{
 		NetActionPtr base = std::static_pointer_cast<NetAction>(action);

logic/net/PasteUpload.h

@@ -9,6 +9,7 @@ class PasteUpload : public Task
 	Q_OBJECT
 public:
 	PasteUpload(QWidget *window, QString text);
+	virtual ~PasteUpload(){};
 
 protected:
 	virtual void executeTask();