Merged r12408 from trunk to 2.4-stable (#15696)
Russian translation updated by Alex Stein.
Merged r12407 from trunk to 2.4-stable (#15688)
Spanish translation updated by Borja Campina.
Bulgarian translation updated by Ivan Cenov (#15700)
Russian translation updated by Alex Stein (#15696)
Spanish translation updated by Borja Campina (#15688)
Adds tests for custom field description.
Removed default values on custom field min and max length.
ruby1.8 compatibility.
Removed hardcoded format in API response.
Removed hardcoded formats for right-click edit.