Reorganize and prepare for SDL integration

app/gui/popupmanager.h

@@ -0,0 +1,18 @@
+#ifndef POPUPMANAGER_H
+#define POPUPMANAGER_H
+
+#include <QtWidgets>
+
+class popupmanager
+{
+public:
+    popupmanager();
+    static void displayPinDialog(QString pin, QWidget* parent);
+    static void closePinDialog();
+    static QString getHostnameDialog(QWidget* parent);
+
+private:
+    static QMessageBox *pinMsgBox;
+};
+
+#endif // POPUPMANAGER_H