Merge pull request #538 from m0sth8/fix-timesince

Add omitted lang
Fix malformed address
Merge pull request #539 from Xefir/dev

Fix malformed address
Fix #532, add system notice
Allow mail with self-signed certificates
Allow custom locale
Webhook delivery locking & Hide repo for org members if they don't have access
Add locale zh-HK (Traditional Chinese)
Mirror fix on admin/orgs paging
Merge pull request #544 from TonyTsangHK/dev

Add locale zh-HK (Traditional Chinese)
Issue: Show error prompt when add repository to team and it does not exist #533
Hide org member in collar page
Prepare for v0.5.5
Page: Compare 2 commits
Add push tag action
bug fixed for #540
add omitted lang