ds 8.x-3.2

Changes since 8.x-3.1:

• #2875412 by a.milkovsky: Illegal offset type in isset or empty in _ds_field_ui_table_layouts
• #2897810 by gambry, aspilicious: Some fields are not shown when DS used with Field Layout core module
• Follow up for 2983475
• Finish porting tests to use BrowserTestBase
• #2836046 by Jānis Bebrītis, mErilainen, ndlarge: DS Token fields don't render in the page language
• #2902336 by volkswagenchick: Typo in User Interface
• #2976560 by aspilicious, Gtucker6: Services file has wrong argument for ds.route_subscriber
• #2864864 by heshanlk, rwam, johannijdam: The DS configurations are empty on template_preprocess_ds_entity_view
• #2983475 by aspilicious: EntityViewBuilder
• Temporary disable fieldgroup tests
• Fix tests part 1
• #2947362 by roborew: Running phpunit test results in FieldGroupTestTrait not found error
• #2779243 by efpapado, Peacog: Method declaration incompatibility
• #2880665 by sokru, aspilicious: After 8.3.0 update, some DS block fields cause php notice
• #2327879 by acbramley, DYdave: Block css classes not being applied to DS Field