Increased size of modal, added description as caption to photos

app/controllers/conference_controller.rb

@@ -4,8 +4,8 @@ class ConferenceController < ApplicationController
     not_found unless @conference.make_conference_public?
   end
 
-  def fetch_gallery_photos
-    @photos = Conference.find(params[:id].to_i).photos
+  def gallery_photos
+    @photos = Conference.find_by_short_title(params[:id]).photos
     render "photos", formats: [:js]
   end
 end