v1.15.6

Added

• [stable31] refactor: convert store to factory functions by @backportbot[bot] in #7401
• [stable31] feat(sharing): ability to leave a shared board by @backportbot[bot] in #7474

Fixed

• [stable31] fix: view mode menu when open archived card by url by @backportbot[bot] in #7424
• [stable31] Fix 'Unassigned' board filter by @backportbot[bot] in #7470
• [stable31] fix: board & label color picker by @backportbot[bot] in #7465
• [stable31] Focus input field when executing by @backportbot[bot] in #7473