Disable removing conditional HTML

https://docs.microsoft.com/en-us/previous-versions/windows/internet-explorer/ie-developer/compatibility/hh801214(v=vs.85)

app/src/main/java/eu/faircode/email/HtmlHelper.java

@@ -260,7 +260,7 @@ public class HtmlHelper {
         Document parsed = JsoupEx.parse(html);
 
         // <!--[if ...]><!--> ... <!--<![endif]-->
-        if (!display_hidden)
+        if (!display_hidden && false)
             parsed.filter(new NodeFilter() {
                 private boolean remove = false;