Merge tag 'v2.13.10' into develop

version v2.13.10
troubleshoot SMS module + fix ContentType smscampaignsubscriber
adding .gitattributes for unified line-ending
adding .gitattributes for unified line-ending
display total duration and billsec duration on dashboard
prepare version v2.13.11
Merge branch 'release/v2.13.11'