v8.3.9

What's Changed

Bug Fixes

• [8.3-stable] fix(uploader): validate uploads by filename extension by @alchemycms-ci-bot in #4207
• [8.3-stable] fix(migrations): only drop the DDL transaction where SQLite rebuilds by @alchemycms-ci-bot in #4213

Security

• fix(csv export): escape formulas in admin resource exports [8.3-stable] by @tvdeyen in #4222

Other Changes

• [8.3-stable] fix(dragonfly): derive the attachment extension from the file name by @alchemycms-bot[bot] in #4208
• [8.3-stable] fix(tom-select): close the dropdown before destroying a select by @tvdeyen in #4217
• [8.3-stable] fix(admin): scope nested element form to parent on validation error by @alchemycms-bot[bot] in #4219
• [8.3-stable] fix(admin): show validation errors on the new element form by @alchemycms-ci-bot in #4218

Full Changelog: v8.3.8...v8.3.9