Pushing while committing should only push to current branch by default (Git)

Hi there,
When making a Git commit, SourceTree presents the option to push the change immediately to a remote ("Push commits immediately to: ")

However, this pushes all branches. It'd be better if it only pushed the current branch by default, since there can often be non-fast-forward updates on other branches which cause this command to fail.

Thanks for a fantastic product.

Regards,

Graeme