feat: option to limit svg support to svg tiny 1.2 only

app/settingsdialog.h

@@ -27,6 +27,7 @@ private:
     QCheckBox * m_useLightCheckerboard = nullptr;
     QCheckBox * m_loopGallery = nullptr;
     QCheckBox * m_autoLongImageMode = nullptr;
+    QCheckBox * m_svgTiny12Only = nullptr;
     QComboBox * m_doubleClickBehavior = nullptr;
     QComboBox * m_mouseWheelBehavior = nullptr;
     QComboBox * m_initWindowSizeBehavior = nullptr;