Follow up for #1807692: Introduce a column synchronization capability to translate alt and titles through the core image field widget
Problem/Motivation
parts of the operations column should be modals (this motivation could use expansion/rewording)
Proposed resolution
put this sync setting on the custom language setting page (in the regional config page) admin/config/regional/content-language and move other settings there into a modal.
Remaining tasks
User interface changes
Use configure link and a modal for the actual settings.
API changes
No API changes expected.
Original report by @Bojhan
in #1810386-15: Create workflow to setup multilingual for entity types, bundles and fields (modals are then discussed in several other comments on that issue)
Also mentioned in #1807692-9: Introduce a column synchronization capability to translate alt and titles through the core image field widget and #1807692-72: Introduce a column synchronization capability to translate alt and titles through the core image field widget 2.