Small change in render_to_string method in order to dont block render_to_string in plugins.

misago/template/loader.py

@@ -1,8 +1,8 @@
 from django.template.loader import render_to_string as django_render_to_string
-from misago.template.middlewares import process_context
 from misago.template.theme import prefix_templates
 
 def render_to_string(template_name, dictionary=None, context_instance=None):
+    from misago.template.middlewares import process_context
     dictionary = process_context(template_name, dictionary, context_instance)
     template_name = prefix_templates(template_name)
     return django_render_to_string(template_name, dictionary)