Huge cleanups and added open gl window

src/editor/dialogs/maskpropertiesdialog.cpp

@@ -0,0 +1,16 @@
+#include "maskpropertiesdialog.h"
+#include "ui_maskpropertiesdialog.h"
+
+MaskPropertiesDialog::MaskPropertiesDialog(QWidget *parent) :
+    QDialog{parent},
+    m_ui{std::make_unique<Ui::MaskPropertiesDialog>()}
+{
+    m_ui->setupUi(this);
+
+#ifdef Q_OS_LINUX
+    setWindowFlags((windowFlags() & ~Qt::Dialog) | Qt::Window);
+#endif
+    setWindowFlag(Qt::WindowCloseButtonHint);
+}
+
+MaskPropertiesDialog::~MaskPropertiesDialog() = default;