Adds issue custom fields to time entries filters (#10191).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11171 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/time_entry_query.rb

@@ -88,7 +88,7 @@ class TimeEntryQuery < Query
     } unless activities.empty?
 
     add_custom_fields_filters(TimeEntryCustomField.where(:is_filter => true).all)
-    add_associations_custom_fields_filters :project, :user
+    add_associations_custom_fields_filters :project, :issue, :user
 
     @available_filters.each do |field, options|
       options[:name] ||= l(options[:label] || "field_#{field}".gsub(/_id$/, ''))