Suggest to re-order the SCM source tab in the Pipeline create dialog

Created by: LinuxSuRen

What would you like to be added:

There's no rule for the order of SCM sources.

Why is this needed:

Git now is the most popular tool. In the private deployment use case, Gitlab is much popular than others. But Gitlab is the last one, it's no reason for that.

/area devops /priority low