Original request description
Customers might end up having a lot of dead branches laying around in Stash / Bitbucket Server because developers who do merges do not always check the "Delete source branch after merging" option.
There should be a way to configure Stash / Bitbucket Server to enable the "delete branch" option for all pull requests as the default, in order to force developers to uncheck the option if they actually wanted to keep the branch.
Actually, it would be better to configure the option based on branch name patterns. For example branches named "releases/*" the default would be to NOT delete the branch.