Added `Field->prepareAssociationsDrawerXMLElement` function
Update the upload field for the association drawer
Added the field-{type} class on the li tag in order to identify each related field types
Make sure generate wont fail is the value is an array
Merge pull request #1865 from DeuxHuitHuit/field-asso

Added `Field->prepareAssociationsDrawerXMLElement` function
Merge pull request #1868 from DeuxHuitHuit/XMLElement

If `XMLElement->setValue` is passed an array, implode it instead of crashing
Merge pull request #1877 from nilshoerrmann/integration

Remove Pickable Interface from Event Editor. Fixes #1873
Track latest SBL
If a section is unsorted via ?unsort, then sort descending. Finally fixes #1858
Fix sorting issues by redirecting. See #1858.
Merge pull request #1882 from michael-e/integration

Unsort descending, and fix special sorting issue by redirecting. RE: #1858
Collapsible optimisation, first tests
Remove legacy and deprecated components
Remove legacy styles
Use 2.3 Duplicator API
Don't manipulate the DOM in order to lock ordering. This speeds up rendering other animations like collapsing.
Move Duplicator animations to CSS
Move Collapsible animations to CSS
Clean up section editor interactions
Simplify backend frames