LPS-30963 Initial source formatting
LPS-30963 Include ddmStructureKey in callback functions
LPS-33660 Use ddmStructureKey instead of ddmStructureId in edit feed dialog

JournalFeed stores references to structureId and templateId (corresponding to ddmStructureKey and ddmTemplateKey as for 6.2.x). Using ddmStructureId/ddmTemplateId here is not necessary and may be confusing.
LPS-33660 Add label to template radio inputs
LPS-30963 Store ddmStructureKey preference instead of ddmStructureId in Web Content List
LPS-30963 Improve UI for selecting structures making it consistent with the mange UI (show description and modified date)
LPS-30963 Apply new pattern to select_structures
LPS-30963 remove unused code
LPS-30963 SF