Fix memleak in dock window

Author: iakov

qrgui/mainWindow/lsan.supp

@@ -12,6 +12,7 @@ leak:QApplication::desktop()
 leak:*/libfontconfig.so.1*
 leak:*/libfreetype.so.6*
 leak:*/libglib-2.0.so.0*
+leak:xdg_mime_init
 # From unit tests. These should be fixed one by one.
 leak:QPlatformIntegrationFactory::create
 leak:QFontconfigDatabase::addApplicationFont(QByteArray const&, QString const&)

qrutils/smartDock.cpp

@@ -34,8 +34,8 @@ SmartDock::SmartDock(const QString &objectName, QWidget *innerWidget, QMainWindo
 	, mDialog(new QRealDialog(objectName, this))
 	, mCurrentMode(Mode::Docked)
 {
+	setParent(mMainWindow);
 	setObjectName(objectName);
-
 	initDock();
 	initDialog();
 }