Finish HTML source mode before loading a new document (forgot 2nd part of fix), b=102684, r=brade, sr=kin

editor/ui/composer/content/editor.js

@@ -1433,6 +1433,9 @@ function EditorOpenUrl(url)
   {
     if (PageIsEmptyAndUntouched())
     {
+      if (IsInHTMLSourceMode())
+        FinishHTMLSource(); 
+
       window.editorShell.LoadUrl(url);
     }
     else