WIP Add some digital object RDE bits...
Add backend endpoints for adding children to both digital objects and components
Add a new schema for passing around digital object children
Fix backend endpoint for adding children to digital components and add tests
Fix drag of column headers failing after deprecation of the event 'handle'.. it's now called 'dispatch'
First crack at DO RDE - still duplication and refactor required
Add missing files... and fix the sequence generator and move onto the resolver controller for now
Add file_version to the DO RDE
Fix sticky columns for DO RDE
Refactor RDE = shared RDE wrapper template with custom record specific templates + a new RecordChildren mixin to handle cleaning the RDE rows for before converting to the child record
Add DO RDE selenium tests; Also make the RDE exception labels more fine grained to match the exact row input (and label) - this fixes the issue in the DO RDE where two columns have the same label and the expections were being marked on both fields
Move the sequence_generator to a new controller
(utils); Also fix the selenium tests that were failing as the RDE DO was pushed to the 2nd page in the search results.. oops
Fix references to AO's in DOC methods
Rever changes to note_helper - not required
Merge pull request #662 from hudmol/do-rde

[Delivers #62894440] RDE for Digital Objects