increase preview size and disable link to avoid confusion

Author: bulam

knowledge_repo/app/templates/post_editor_proxy.html

@@ -12,6 +12,6 @@
 
 
 {% block render_block %}
-<a href="{{ proxy }}">Linked Post</a>
-<iframe width=100% height=800 src="{{ proxy }}"></iframe>
+<b>Linked Post Preview</b>
+<iframe width=100% height=1000 src="{{ proxy }}"></iframe>
 {% endblock render_block %}