Release 8.x-1.11

Ticket for planning and tracking the progress toward a 8.x-1.11 release.

Let's aim to complete the following issues and cut a 8.x-1.11 release:

• #3268437: Save export file permanently
• #3028114: Allow spaces in columns name (CSV export)
• #3554267: Make the export buttons 'better'
• #3103807: Data export doesnt work on Safari