ui: fixed crash when clicking on namespace label

src/lib_gui/qt/network/QtUpdateChecker.cpp

@@ -175,7 +175,7 @@ void QtUpdateChecker::check(bool force, std::function<void(Result)> callback)
 void QtUpdateChecker::checkUpdate()
 {
 	m_onQtThread(
-		[this]()
+		[]()
 		{
 			check(false, [](Result){});
 		}

src/lib_gui/qt/view/graphElements/QtGraphNodeQualifier.cpp

@@ -74,6 +74,8 @@ bool QtGraphNodeQualifier::setPosition(const Vec2i& pos)
 
 void QtGraphNodeQualifier::onClick()
 {
+	hide();
+
 	MessageActivateNodes msg;
 	msg.addNode(0, m_qualifierName);
 	msg.dispatch();

src/lib_gui/qt/window/project_wizzard/QtProjectWizzard.cpp

@@ -647,7 +647,7 @@ void QtProjectWizzard::newSourceGroup()
 	}
 
 	QtProjectWizzardWindow* window = createWindowWithContent(
-		[this](QtProjectWizzardWindow* window)
+		[](QtProjectWizzardWindow* window)
 		{
 			window->setPreferredSize(QSize(570, 380));
 			return new QtProjectWizzardContentSelect(window);