feat: option for set window startup size

app/settingsdialog.h

@@ -21,6 +21,7 @@ private:
     QCheckBox * m_stayOnTop = nullptr;
     QComboBox * m_doubleClickBehavior = nullptr;
     QComboBox * m_mouseWheelBehavior = nullptr;
+    QComboBox * m_initWindowSizeBehavior = nullptr;
 };
 
 #endif // SETTINGSDIALOG_H