GIT default branch setting
In the GIT Org edit page, there is an extra field "Default Git Branch" where you can set the default branch for Deployments or CI job using this GIT source.
Default sorted by "last view"
When the View option is "Recently viewed", the default sort option will be "Last Viewed" date. This is applied for the Deployments, Work Items, and CI tabs.
Bitbucket Enterprise webhook update
When using Bitbucket on cloud with ssh login option, you can change the Org type to "Bitbucket Enterprise" where you can enter the username and the ssh key. However, there was an issue with webhook in this case because Bitbucket on Cloud and Enterprise are having different webhook format. This issue has been fixed in this release.