--- src/widgets/ErrorDialog.cpp
+++ src/widgets/ErrorDialog.cpp
@@ -122,0 +123,8 @@
+// make help dialog modal
+class HtmlTextHelpDialog : public BrowserFrame
+{
+public:
+   HtmlTextHelpDialog() : BrowserFrame() { MakeModal(true); }
+   ~HtmlTextHelpDialog() { MakeModal(false); }
+};
+
@@ -127 +135 @@
-   BrowserFrame * pWnd = new BrowserFrame();
+   HtmlTextHelpDialog * pWnd = new HtmlTextHelpDialog();