Changelog for the upcoming release (preview)

Fixes

• Fixed some typos
• Removed inaccessible polls from polls overview
• Removed link target from inaccessible polls in navigation
• Removed clone action from inaccessible polls in navigation
• Fixed visual bug when scrolling in list view
• Fixed exception on notifications which may cause resending notification mails

Changes

• Center poll table

Full Changelog: v8.1.4...v8.2.0-rc.1