Support choosing checkout branch method when status is not empty

[Fatpandac]

This Pull Request fixes/closes #2404.

It changes the following:

• support choosing checkout branch method when status is not empty
• add .editorconfig file

I followed the checklist:

• [ ] I added unittests
• [X] I ran make check without errors
• [X] I tested the overall application
• [X] I added an appropriate item to the changelog