Redirect to the current page when using context menu on the issue list (#4184).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3027 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/issues_controller.rb

@@ -424,7 +424,7 @@ class IssuesController < ApplicationController
     
     @priorities = IssuePriority.all.reverse
     @statuses = IssueStatus.find(:all, :order => 'position')
-    @back = request.env['HTTP_REFERER']
+    @back = params[:back_url] || request.env['HTTP_REFERER']
     
     render :layout => false
   end