created directory for dialogs

src/widgets/dialogs/QualityPopup.hpp

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "widgets/BaseWindow.hpp"
+
+#include <QComboBox>
+#include <QDialogButtonBox>
+#include <QPushButton>
+#include <QVBoxLayout>
+
+namespace chatterino {
+namespace widgets {
+
+class QualityPopup : public BaseWindow
+{
+public:
+    QualityPopup(const QString &_channelName, QStringList options);
+    static void showDialog(const QString &_channelName, QStringList options);
+
+private:
+    struct {
+        QVBoxLayout vbox;
+        QComboBox selector;
+        QDialogButtonBox buttonBox;
+        QPushButton okButton;
+        QPushButton cancelButton;
+    } ui_;
+
+    QString channelName;
+
+    void okButtonClicked();
+    void cancelButtonClicked();
+};
+
+}  // namespace widgets
+}  // namespace chatterino